Harbour Bridge train-surfing teen charged

A 15-year-old boy has been arrested for allegedly train-surfing across the Sydney Harbour Bridge.

He's accused of riding on the back of a train carriage from Wynyard station to Milsons Point station with another person in September.

Police described the action as "extremely dangerous".

The Lane Cove teenager was arrested on Sunday and will front the Children's Court on December 15.