A local Nepalese community is mourning the death of a young family killed in a crash in Victoria's west earlier this week.

Sapana Neupane, 31, her husband Krishna, 41, and their three-year-old son were killed when the car they were travelling in collided with a truck in Stoneleigh, near Ballarat on Tuesday morning.

Sapana's mother survived the horror crash, but was airlifted to hospital with critical injuries, according to The Age.

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Police believe the car drove into the path of the oncoming truck after failing to stop at an intersection shortly after 9.30am.

The family, who lived in Armstrong Creek near Geelong after migrating from Nepal, leave behind a five-year-old daughter.

The Geelong Nepalese Association said the family's "kindness, warmth, and love will always be remembered".

"We extend our deepest condolences and prayers ot their family and relatives," the association said in a Facebook post.

"May their beautiful souls rest in eternal peace, and may their loved ones find strength and comfort during this unimaginable time.

"The Geelong Nepalese Community is deeply saddened by this tragic loss and stands together in full support of the family and their daughter during this most difficult time."

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The NZ Performance Academy Aotearoa school will still open as planned.

A student who police say was armed with a knife has been Tasered and arrested at a high school in Sydney's north.

Officers were called to North Sydney Boys High following an "altercation" between two students in a classroom about 12.30pm today.

Police said one of the students left the classroom armed with a knife.

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The school was placed into lockdown for an hour as police searched for the teenage student, before he was found by officers, then Tasered and arrested.

"It was pretty confronting to be honest, because of the size of the knife," a witness told 9News. 

The boy was taken to hospital, and the lockdown lifted about 1.30pm.

The NSW Department of Education said the lockdown had been used "as a precaution".

"All students and staff are safe, and students resumed classes after 1.30pm," a spokesperson said.

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Detectives from other districts have joined the Hastings inquiry.

Police have alleged that a self-proclaimed fortune teller and her daughter, charged over an alleged $70 million fraud in Sydney, are connected to one of the largest fraud syndicates in Australian history.

53-year-old Anya Phan, who claimed to be a feng shui master and fortune teller, and her 25-year-old daughter were arrested yesterday at her multimillion-dollar Dover Heights mansion in the city's eastern suburbs.

Phan is accused of exploiting vulnerable clients in Sydney's Vietnamese community.

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"We know she has at least laundered $520,000 in a two-month period alone at this Sydney-based casino," Deputy Superintendent Gordon Arbinja, the commander of the NSW Police financial crimes squad, said.

"She is a high roller and very influential amongst her community."

Police will allege that she is one of the heads of the Penthouse Syndicate, one of the largest fraud syndicates in Australia's history.

"What's alarming in this one is now the syndicate has shifted," Arbinja said.

"The syndicate is now preying on you, on vulnerable people that are trusted within their community."

She allegedly persuaded victims to take out financial loans – while taking a share herself – based on her prediction that there was a "billionaire" in their future.

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The fraud, allegedly orchestrated with the help of her daughter, is estimated to total nearly $70 million.

During the pair's arrest, police also seized financial documents, mobile phones, other electronics, luxury handbags, a 40-gram gold bar worth $10,000 and $6600 in casino chips.

The NSW Crime Commission froze an additional $15 million worth of assets.

Phan has been charged with more than 40 offences, including dishonestly obtaining financial advantage by deception and dealing with the proceeds of crime.

She was refused bail to appear in court today.

The daughter was charged with offences including obtaining financial advantage by deception and dealing with the proceeds of crime.

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"The younger woman was charged with two offences, mainly fraud in relation to the purchase of a $5.3 million apartment in Rose Bay," Arbinja said.

She was granted conditional bail and is scheduled to appear in court tomorrow.

Arbinja said they came to the attention of Strike Force Myddleton detectives investigating a criminal syndicate targeting vehicle financing companies.

"What began as an investigation into fraudulent car financing has expanded into uncovering one of the most sophisticated financial crime syndicates I have seen in my career at the helm of the Financial Crimes Squad," he said.

Seventeen people have already been charged with links to the syndicate, with police saying there are more arrests to come.

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Police also located methamphetamine, a loaded pistol, cash and electronic devices.

One woman says a teenager on an e-scooter punched her as she lay in the sun.

Multiple employees complained the man would constantly watch pornography in his office.

Emergency services were called to the scene about 5.05pm.

A Queensland resident with a confirmed case of measles visited parts of Sydney while infectious, including Accor Stadium for an Oasis concert, NSW Health authorities have warned.

The health alert comes after three cases of measles were confirmed in Queensland associated with the Jelly Roll concert in Brisbane on October 24.

A NSW Health spokesperson said people who attended the Oasis concert at Accor Stadium in Sydney on Saturday should monitor for symptoms until Friday, November 28.

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The person also visited the Sydney Airport, the CBD, and inner west locations, and used trains between Saturday and Monday.

A full list of locations is posted on the NSW Health website.

"These locations pose no ongoing risk," NSW Health said.

Queensland Health yesterday issued its own measles alert after three confirmed cases emerged from a concert at the Brisbane Entertainment Centre.

Anyone who attended American singer Jelly Roll's show on October 24 could have been exposed and is urged to be on the lookout for symptoms.

The three people spent time in the Gold Coast, Brisbane and Wide Bay areas while unknowingly infectious, Queensland Health said.

Health Protection NSW executive director Dr Jeremy McAnulty said measles is a vaccine preventable disease that is spread through the air when someone who is infectious coughs or sneezes.

"Symptoms to watch out for include fever, sore eyes, runny nose and a cough, usually followed three or four days later by a red, blotchy rash that spreads from the head and face to the rest of the body," McAnulty said.

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"It can take up to 18 days for symptoms to appear after an exposure, so it's important for people who visited these locations to look out for symptoms up until Friday, November 28.

"It's important for people to stay vigilant if they've been exposed, and if they develop symptoms, to please call ahead to their GP or emergency department to ensure they do not spend time in the waiting room with other patients.

"We want to remind the community to make sure they are up to date with their vaccinations.

"This should be a reminder for everyone to check that they are protected against measles, which is highly infectious.

"Anyone born after 1965 needs to ensure they have had two doses of measles vaccine. This is especially important before overseas travel, as measles outbreaks are occurring in several regions of the world at the moment."

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