A teenage boy has fallen from a train on the Sydney Harbour Bridge, triggering a multi-agency emergency response.
Police and paramedics were called to the rail corridor between Wynyard and Milsons Point train stations about 11:30am on Thursday.
A rescue helicopter with a medical team also landed at nearby Bradfield Park to treat the boy.
Police were told the teenager fell from a train onto the tracks on the harbour bridge.
He was transported to Royal North Shore Hospital. His condition is unknown.
Trains on the T1 North Shore line are running again between Wynyard and North Sydney.
Transport for NSW told commuters to expect delays of up to 40 minutes as services recover.
Services on the T9 Northern Line are also impacted.
Passengers have been advised to allow extra travel time and consider alternative services, including the Metro.
