A teenager is in a critical condition after falling from a cliff on Sydney's lower north shore, police say.
A teenage male was ejected from an amusement park at Milsons Point for allegedly being affected by alcohol, about 10.10pm on Friday, police said.
About 30 minutes later, security staff at the park received reports a 17-year-old male had scaled a fence and then fallen about 20 metres from a cliff in nearby Paul Street.
Police and other emergency services personnel attended the scene and located the teenager who had sustained serious head and back injuries.
The teenager was taken to Royal North Shore Hospital and remains in a critical condition in intensive care.