By ANNA USHER

A teenage boy is fighting for life after falling while train surfing across the Sydney Harbour Bridge.

Mosman Collective understands he is suffering serious head, chest and pelvis after the accident which occurred around 11:30am.

Emergency crews, including paramedics, fire crews and NSW Police were called to the scene, where the boy was wheeled to a waiting ambulance from the Bradfield Park bike ramp.

He was transported to hospital by road.

In a statement, a NSW Police spokesperson said: “A multi-agency operation is underway on the Sydney Harbour Bridge after a teenage boy fell from a train a short time ago.”

“Emergency services were called to the railway corridor between Wynyard and Milsons Point train stations about 11:30am today, following reports a person had fallen onto the tracks.

“Officers attached to the Police Transport Command (PTC) and Sydney City Police Area Command and have been told a teenage boy had fallen from a train onto the tracks on the Sydney Harbour Bridge.

“A Careflight Helicopter landed in Bradfield Park with a medical team; they and NSW Ambulance paramedics are now treating the boy.

“Police have commenced an investigation into the incident.”

More to come.