Family and friends have begun laying tributes at a T-Way in Sydney’s west where two teenagers died in a motorbike accident after colliding with a bus overnight.

The 15-year-old rider and his 14-year-old passenger collided with the bus on the Liverpool-Parramatta T-Way near Restwell Road in Bossley Park about 7.10pm yesterday.

Police said the trail bike became trapped under the bus after colliding with its side.

Tributes being laid at the scene were two teenagers were struck by a bus in Sydney’s west. (Nine)
The two boys died at the scene. (Nine)

Paramedics couldn’t save the boys, who died at the scene.

The 48-year-old bus driver and his passengers were uninjured. He was taken to hospital for mandatory testing.

9News understands that one of the boy’s family homes was 10 metres away from the scene of the accident.

“I saw this little kid get hit by a big bus,” a witness told 9News.

“He saw the bus [make a U-turn] and this guy went straight under the bus.”

Fairfield City Mayor Frank Carbone has been a vocal critic of the use of “illegal e-bikes and motor bikes” on the municipality’s roads, but particularly on the bus-only T-Way corridor.

Police said the bike involved tonight was petrol-powered.

Carbone called on NSW Premier Chris Minns to act.

“This is what happens when the NSW State Government ignores repeated requests for action on illegal E-bikes and motor bikes, which have taken over our T-Way,” he said, on Facebook.

“My thoughts and prayers are with those who were hurt, and I sincerely hope they are okay.

Two teenagers on a motorbike have died in a crash with a bus in Sydney’s west. (9News)

“Chris Minns, enough of the media releases. It is time for action. Do your job, direct police to act, and respond to the repeated calls our community has been making before someone is seriously injured or worse.”

The NSW government moved last year to impose a 20km/h speed limit and a 16-year age limit for e-scooters, but didn’t include e-bikes in the changes.

At the time, Transport Minister John Graham said the government was acting because it recognised community concerns about device modification, fire risk, discarded shared e-bikes and poor rider behaviour.

“They’re known as ‘micro’ devices, but e-bikes and e-scooters represent a major shift for our road and transport networks,” he said in a statement.

“We believe a sensible set of rules will promote the health and lifestyle benefits of e-bikes and e-scooters while protecting the safety of riders and everyone else sharing the paths and roads with them.”