Three people have been arrested in a dramatic stand-off in a Kmart carpark after two women were allegedly threatened with a gun during a home invasion.

A man, a woman and a 17-year-old boy were arrested by heavily armed police at a carpark on Jeffrey Street in Campbellfield in Melbourne's north at about 1.40pm.

Witnesses have told 9News they heard a gunshot.

READ MORE: Group storm Melbourne home with gun, demanding man clear his phone

Police dogs were also used and a police car was damaged during the dramatic arrest, which witnesses captured on camera.

A police dog bit and apprehended the man after up to four unmarked police vehicles boxed in an allegedly stolen Holden Commodore the trio was travelling in.

Police believe the car was stolen yesterday when three people allegedly broke into to a home on Patterson Avenue in Keilor at about 1.30pm.

Inside the home, the group allegedly threatened a 22-year-old woman before stealing the keys to the Holden Commodore.

A 38-year-old woman, who also lives at the property, returned home during the incident and allegedly confronted the offenders as they were trying to steal the car.

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She was then allegedly threatened with a gun before the offenders drove off in the Commodore and another vehicle.

The man was bitten by a police dog during the arrest and suffered minor injuries.

9News understands a gun was seized during the arrest.

The trio are currently assisting police with their enquires.

A man who was killed during a mid-air collision between two light planes yesterday has been identified as local glider Christopher 'Bob' Turner.

A single-occupant glider and an ultra-light aircraft collided yesterday at Gympie Airport in Kybong, regional Queensland at about 2.45pm on Wednesday.

The occupant of the other aircraft, a 77-year-old man, was also killed. 

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Residents struggling to come to terms with the tragedy have remembered Turner, 80, as a beloved local glider.

It is understood Turner was in the air just 20 minutes before the collision occurred. 

"We heard a large bang, I thought that doesn't sound good," witness John Kenman said.

"I didn't really know, I never imagined the two might've collided."

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Mayor of Gympie Regional Council said "it's difficult" to determine what exactly had occurred to cause the collision. 

"In these circumstances, it's very difficult to determine what's gone on," he said.

"You just feel for the families involved."

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Debris from the aircrafts was thrown hundreds of metres apart through nearby paddocks.

Police said that they will remain on scene for some time collecting evidence.

The victim of a shocking home invasion in Melbourne's east is pleading for the public's help to identify the three masked men who held him at gunpoint.

The homeowner was pinned to the floor after he answered the door of his home on Turnbull Avenue in Oakleigh East at about 9pm on May 10.

The group of three men had a photo of resident Frank that he had never seen or shared before and made demands for him to delete items on his phone.

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They then forced their way into his home and one of the three intruders pulled out a gun, before threatening and hitting Frank with it.

CCTV footage shows the trio pinning the resident to the ground.

"I said, I can't delete it while you've got a gun in my head. And then all of a sudden, they've started beating me in the face," Frank said.

A woman living in the same home then intervened, running toward the attackers.

The three attackers fled in an unknown car with Frank's phone, and are still on the run.

Police don't know what car they arrived in and have not been able to track the device's location.

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Frank has said he's never seen the men before.

They're described as being aged in their 20s and wearing dark clothing.

Frank was taken to hospital with facial injuries.

Anybody with information is urged to contact authorities.

The rare blood moon is a special signal for Great Barrier Reef corals to embark on an enormous baby-making event but it takes the help of scientists to ensure its success.

The reef is touted as being worth $56 billion to the Australian economy, but the World Heritage-listed site has been under threat from coral bleaching.

A layperson probably wouldn't think the lunar event would have much impact on the natural wonder, or the thousands of varieties of coral there, but scientists use it to increase the chance of its survival.

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We see a blood moon when the Earth moves between it and the sun, resulting in a total lunar eclipse. 

The blood moon, which is the last until 2025, is a wake-up call for coral in the iconic Great Barrier Reef to start spawning.

Between November 12 and 13, corals will release trillions of eggs and sperm into the water during a mass breeding phenomenon likened to "an underwater snowstorm".

Boats4Corals 2022 tourism operators will use boats to capture coral eggs and sperm and then put them into larvae pools so the spawn can breed into coral.

The program is similar to human IVF procedures as scientists help to bring the eggs and sperm together for a better chance of survival.

Scientists believe Coral IVF improves survival from one in a million coral babies in nature to one in 10,000.

The spawn bundles will stay in the nursery pools for a week while they become coral babies before being settled into targetted areas to bring bright and diverse life back to the Great Barrier Reef.

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Climate change is the biggest enemy of the Great Barrier Reef and risks the 64,000 jobs generated by the booming tourism and science industry.

One of the impacts of climate change is rising water temperatures which causes corals to expel microscopic algae making them white, a process known as coral bleaching.

Bleached coral isn't dead but is more at risk of disease and starvation.

Water acidification and severe weather events like cyclones are also destroying coral reefs.

In light of the impacts of global warming, Great Barrier Reef Foundation Managing Director Anna Marsden said the Coral IVF program is an initiative to keep the natural wonder alive.

"The combination of the tourism industry's leadership, boats, local knowledge, and people-power allows us to achieve reef restoration at a greater scale than researchers can achieve alone so it's a powerful partnership," she said.

Frocks on Friday is the brainchild of Gisborne local Jo McLean, with the aim of encouraging wāhine to wear a dress every Friday and get people thinking about mental health.”When you are wearing your frock on Friday people will…

Major changes to workplace laws that would give workers more power to negotiate a pay rise have passed the first hurdle in federal parliament.

There were cheers from union members and childcare workers cried just after the controversial Secure Jobs Better Pay Bill passed the Lower House with 80 votes to 56.

The Fair Work Legislation Amendment is yet to pass in the Senate, but Labor is celebrating the result nevertheless.

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Workplace Relations Minister Tony Burke declared outside parliament, "Today is a big milestone".

"It's been a long time coming and I know how much it's going to mean."

Labor says the legislation will lift wages by giving workers more power when negotiating for a pay rise.

The legislation includes controversial elements, including multi-employer bargaining, which allows unions to bring workplaces of all sizes to the bargaining table.

The idea has put business groups offside and is one of the concerns held by crucial crossbench Senator David Pocock.

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But Burke has said the concerns are not surprising.

"The concept of getting everybody on board for anything about workplace relations is a remote possibility," he said.

"You can negotiate forever and what happens during that time? We continue with wages being kept low."

Before the bill passed, many of the teal Independents raised their objections to the speed at which the government is trying to get the legislation though, as well as concerns about the potential consequences of the changes.

"It is misleading to the Australian public to claim that this will get wages moving when there is going to be months of delay and negotiation, complex processes and the winners will be the unions and the winners will be the unions and the lawyers. It will not be the workers," Independent MP Zali Steggall told parliament before the bill passed.

Medibank has described the release of more customer data on the dark web as "deplorable" and "a weaponisation of people's private information".

The person claiming to be the Medibank hacker revealed this morning their ransom demand to the health insurer.

On the dark web post additional text was added, stating: "Society ask us about ransom, it's a 10 millions (sic) usd. We can make discount 9.7m 1$=1 customer."

At current rates, $US9.7 million is worth $15.07 million.

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The alleged hacker, also posted: "Medibanks (sic) CEO stated, that ransom amount is 'irrelevant'. We want to inform the customers, that He refuses to pay for yours data more, like 1 USD per person. So, probably customers data and extra efforts don't cost that."

Following the release of 200 users' personal health data yesterday, the hacker has today posted an additional file of sensitive information allegedly obtained in the hack.

9news.com.au understands the diagnostic code listed in the file against the names of over 300 Australian men and women refers to an admission for "supervision of high-risk pregnancy, unspecified, first trimester".

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Federal government condemns hackers over data breach

Home Affairs Minister Clare O'Neil issued a stark warning during parliament's Question Time to the cybercriminals behind the Medibank attack who allegedly released more customer data onto the dark web.

"I want the scumbags behind this to know the smartest and toughest people in this country are coming after you," she said.

O'Neil apologised to the customers whose private health information was allegedly compromised.

"I want to say to the women whose private health information has been compromised overnight as the minister for cybersecurity but more importantly, as a woman, this should not have happened," she said.

"As a government, we stand with you. You are entitled to keep your health information private.

"What has occurred here is morally reprehensible and it is criminal."

'It is an attack on the most vulnerable members of our community'

Meanwhile, Medibank CEO David Koczkar earlier called the data release on the dark web "disgraceful" and once again apologised to customers.

"We take the responsibility to secure our customer data seriously and we again unreservedly apologise to our customers," he said.

"We remain committed to fully and transparently communicating with customers and we will be contacting customers whose data has been released on the dark web.

"The weaponisation of people's private information in an effort to extort payment is malicious, and it is an attack on the most vulnerable members of our community.

"These are real people behind this data and the misuse of their data is deplorable and may discourage them from seeking medical care."

With so much information already leaked, there is a high risk of scams and individual ransom demands to come for the 500 or so Australians whose personal data has already been published.

Those customers should be on high alert for scammers.

As a reminder, Medibank said again today it would never contact customers to ask for passwords or sensitive information.

Medibank is yet to contact the 500,000 customers who have had health data stolen to specifically advise them that they are among the group for whom the hacker has more than just contact information.

Former tennis champion believes he may be a victim of the hack

Former tennis champion Todd Woodbridge has said he believes he may be one of them and has been targeted by scammers following the hack.

Woodbridge, a Medibank customer, said he suffered a minor heart attack last month and recently received a phone call from scammers who tried to get him to pay a "hospital bill".

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They knew the hospital he had stayed at along with other personal information, but Woodbridge, who had already paid the bill, said he didn't hand over any account information.

If you need support around any of the information contained in this article you can find help at Beyond Blue. Visit the website here or call 1300 22 4636

EXPLAINED: What to do if you have been hacked

Taronga Zoo has released more details about last week's lion escape, citing a "clamp failure" as the main reason the animals were able to "squeeze through" a mesh fence.

Five lions were spotted outside of their main enclosure 6.30am last Wednesday, which triggered a major emergency response.

A loud duress alarm – sounded soon after the discovery of the lions outside their normal enclosure – prompted a strict lockdown, which resulted in one lion having to be tranquilised and four others being guided back to safety.

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Today, zoo staff confirmed that although an incident review is ongoing, the structural fault in the fence was to blame.

"Preliminary independent engineering advice has confirmed that swages (clamps that join wire cables together) failed, enabling a lacing cable that connects the fence mesh to a tension cable to unravel," Taronga Zoo said in a statement.

"The lions were then able to create and squeeze through a gap.

"The preliminary review has recommended the engagement of an independent tensile-structure engineer to conduct detailed investigations and provide specialist advice on the failure and repair."

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The review also found that the lions "played and interacted" with the fence for about 20 minutes before four cubs and later an adult male, Ato, were able to break through it.

One lioness, Maya, and one cub chose to stay inside the exhibit.

"Lioness Maya and the cub who chose to remain in the exhibit were recalled into their dens by keepers," the zoo said.

"The emergency response including staff in multiple vehicles was established to monitor and control the situation.

"This enabled the keepers to use their relationships with the lions, as well as their training for such incidents, to calmly call the lions back to their exhibit, ensuring a peaceful and safe outcome for all people and animals."

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Taronga said it will continue to review the incident and share more information when it becomes available.

"The lions will continue to remain in an outdoor, back-of-house holding area pending the specialist engineering advice," the zoo said.

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Former schoolteacher Chris Dawson is a "conniving monster" who betrayed his family, the brother of his murder victim Lynette has told a Sydney court.

In a hearing in the NSW Supreme Court today, a statement by Greg Simms was read out describing how the loss of his sister had impacted generations.

"We considered you an equal in all respects. We trusted you. You repaid us by committing the ultimate betrayal," Simms wrote.

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Today's sentencing hearing comes 10 weeks after Dawson, now 74, was found guilty of murdering his wife in January 1982 so he could have an unfettered relationship with one of his high school students, known as JC.

"It was a brazen act of a conniving monster hell bent on one thing, getting what you wanted at any cost," Simms said.

Wearing prison greens sitting in the court dock, Dawson listened to statements from Simms as well as Lynette's sister Patricia Jenkins and his own daughter Shanelle Dawson.

Before reading her statement, Shanelle took a pause to fiercely stare at Dawson from across the courtroom, breaking into tears before speaking.

"The night you removed our mother from our lives was the night you destroyed our sense of safety and belonging in this world," she said.

Saying she had glimpses of memories from the "nightmare night" her mother disappeared, she said her life had been shattered, she found it difficult to trust men, and she had been diagnosed with PTSD after learning what her father was capable of.

"The torture of not knowing what happened, of what you did with her body – please tell us where she is. I hope you will finally admit the truth to yourself," she said.

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In a five-hour judgment delivered on August 30, the judge outlined why Dawson was guilty of killing his wife and disposing of her body.

Dawson went missing from the couple's Bayview home in Sydney's northern beaches. Her body has never been found despite extensive police searches.

Dawson has consistently denied any involvement in his wife's disappearance, claiming she simply up and left her family home and children without a trace.

Justice Harrison rejected this version of events as "ludicrous".

Two days after the judgment, a lawyer for the ex-Newtown Jets rugby league player told the court his client had already received death threats while at Silverwater prison due to the high-profile nature of the case.

The case shot into the public eye largely as a result of The Teacher's Pet podcast by The Australian's Hedley Thomas which garnered millions of views across the globe.

On the day of the guilty verdict, police confirmed the investigation into Dawson's murder was not over and urged anyone with information to come forward.

Dawson has already filed an appeal against his conviction.