A grandmother who dedicated her life to her local church and volunteering at a primary school was one of two women killed in a horror crash involving an allegedly stolen car.

Maureen Crosland, 84, was travelling with a soon-to-be relative yesterday to pick up a wedding dress for her granddaughter.

The Alfa Romeo they were in was hit by a car that was allegedly speeding on the Old Hume Highway in Camden in south-west Sydney.

READ MORE: Man critical after crashing e-bike while allegedly fleeing police

The car was allegedly stolen from a service station in Sydney's south and police had tracked it for about 40 minutes before the fatal collision.

Crosland and the other woman in the car, 60-year-old Lee Casuscelli, died at the scene.

Crosland, whose granddaughter is set to marry Casuscelli's son, is being remembered for her service and dedication to St John the Evangelist Catholic Church in Campbelltown, with her death devastating the community.

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"When I announced it during Mass this morning, people were visibly moved and shaken," Assistant Priest at St John the Evangelist Richard Healey said.

"People were in tears at the tragedy of the whole situation.

"They were on their way with the mother of the groom to pick up wedding dresses, just devastating."

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Luke Francis, 31, has been charged with multiple offences, including dangerous driving occasioning death.

He did not apply for bail in court today and will remain behind bars.

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Police admit they fear for the wellbeing of an 85-year-old Sydney man, as new footage shows the moment he was taken from his home.

Newly released vision shows a dark Toyota pulling into Northcott Street in North Ryde before Chris Baghsarian was kidnapped just before dawn on Friday morning.

A man in high-vis clothing is seen walking out of the car followed by an accomplice.

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Moments later, they are seen pushing the elderly man across the landing as the car moves into position.

Witnesses recall Baghsarian screaming as he was put into the car, and glass smashing.

READ MORE: Man critical after crashing e-bike while allegedly fleeing police

Investigators are trying to unravel why the grandfather was taken and still believe it was a case of mistaken identity.

Robbery and serious crime squad detectives are looking into whether the intended target was a known criminal who lives nearby and has potential links to the Alameddine crime network.

"Those who have him do not have the right person," a police officer said in a press conference.

Baghsarian's neighbours say he is a widower who has lived alone for about four years.

READ MORE: Man charged after two women killed in crash with allegedly stolen car

Police said they have seen a video made by the kidnappers that shows Baghsarian's face covered and his hands tied with duct tape.

"We fear for the safety of the hostage and we think he may have been harmed," Detective acting Superintendent Andrew Marks said.

The Toyota used in the kidnapping was later found burned out in the nearby suburb of North Turramurra.

Police urge anyone who has information or witnessed anything out of the ordinary to contact police immediately.

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A 39-year-old man has suffered serious head injuries after crashing his e-bike into a pole in south-west Sydney while allegedly riding away from police.

Police tried to stop the cyclist, who they said wasn't wearing a helmet, about 11pm on Saturday in Sadlier near Liverpool.

The rider allegedly fled from police but then hit a telegraph pole on the footpath.

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Police gave first aid but he suffered significant head injuries and was rushed to hospital.

He underwent surgery and is in a critical but stable condition.

The actions of the police officer are being investigated.

NSW Police Assistant Commissioner Brett McFadden said police understood the rider wasn't wearing a helmet.

READ MORE: Man charged after two women killed in crash with allegedly stolen car

"One of the things we don't know is whether the person on the bike was known to the officers, whether there was a job they were responding to, whether there was intelligence they were responding to," he said.

"There's a lot of information that the officers have that may be able to assist with the investigation."

McFadden said he was unsure of what exact e-bike was involved in the collision, but told media it did not have pedals and was only powered by an engine.

Some such e-bikes are now illegal in NSW.

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"I can't give you an indication of what speed, but we do know the impact with the pole was significant," he said.

Despite investigations into the officer now under way the neighbours close to the incident that 9News spoke to have not been contacted by police, their security vision has not been requested and the officer behind the wheel has not been questioned

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Undercover police have rammed a car in the middle of Melbourne after it was seen driving erratically.

A 35-year-old man was allegedly seen driving a Hyundai in a dangerous manner outside Southern Cross station today, just outside the headquarters of Victoria Police.

Witnesses said he was seen on the tram tracks, which led to police trying to stop him.

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The driver was eventually cornered by police on Spencer Street, where he allegedly made a last-ditch effort to escape by attempting to break through a gap.

A police officer was forced to jump out of the way, as the car headed straight for a taxi.

READ MORE: Man critical after crashing e-bike while allegedly fleeing police

Multiple taxis were caught up in the pile-up, and one driver was trapped, as police swarmed the driver.

He was eventually taken out of the car, with police having guns and Tasers drawn as he was apprehended.

The man was loaded onto a stretcher and taken to hospital under police guard.

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A teenager is in hospital with serious brain injuries after he was coward punched by a stranger outside a popular Adelaide nightclub.

The victim's parents say they thought they'd lost their boy and are now begging his attacker to hand himself in. 

The attack on Beau Brownbill, 18, happened at 1am today on Hindley Street.

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His mother Megan said it was "every parent's worst nightmare."

He was seen exchanging words outside Fabric nightclub with a man whoe left the queue to confront Beau.

A scuffle followed and then one punch.

Beau was left lying on the concrete as the man fled.

"I want that gentleman to understand what he's done is, he's changed someone's life forever, he's changed our family's forever," father Tony said.

READ MORE: Man critical after crashing e-bike while allegedly fleeing police

Beau was knocked unconscious and raced to hospital where he remains with a fractured skull and bleeding on his brain.

"He's at the time of his life where he should be experiencing the best things in life, and this should not be happening," Megan said.

Beau's parents were told to prepare for the worst.

"They took us into a side room and we thought it was it for Beau and that was the end for Beau so it was very very distressing," she said. 

While there have been encouraging signs in Beau's recovery, the true extent of his brain damage remains unknown and only time will reveal what lies ahead.

Beau's attacker is a stranger he says he'd only met earlier in the night.

No arrests have been made.

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"You'll get some pain in regards to what the law inflicts on you, take it on the chin like you gave it to my son on the chin," Megan said.

MetService warns swells could reach seven metres on Wellington’s south coast.

Security dragged the protester back into the crowd as MPs watched on.

The high-speed chase ended when the tyres of the men’s getaway car were spiked.

The man has a history of violence against women on both sides of the Tasman Sea.

The injured climber was winched from Mt Brewster at about 3.25pm.