A teenager has been rushed to hospital after being injured in a cliff fall while allegedly evading police in Sydney's inner west.
About 1.40am police saw a motorcycle which had been reported stolen being ridden with another bike along Toxteth Road in Glebe.
Police attempted to pull the riders over for a random breath test, however both allegedly failed to stop and after a short pursuit, the two teens dropped the motorcycles and jumped a fence barricading a cliff.
A 17-year-old boy fell 10 metres to the bottom of the cliff and suffered serious injuries.
He was taken to Royal Prince Alfred Hospital where he is reported to be undergoing surgery and remains in a critical condition.
A second boy, also aged 17, suffered minor injuries after landing on a ledge two metres down.
A police officer also sustained minor injuries and was treated at the scene.
"It was complex and obviously the police were concerned for the two males," Acting Assistant Commissioner Stacey Maloney said.
A critical incident team is now investigating the circumstances surrounding the incident including the conduct of the officers involved.
Acting Assistant Commissioner Maloney said at this stage, she does not believe there was any misconduct involved by police however the investigation is yet to make any final conclusions.
"Police were doing what they were supposed to be doing patrolling the area, they saw a motorbike they believed to be stolen and they did everything at that point in terms of getting them to stop correctly," she said.
Police are appealing for witnesses to come forward.