Police have clashed with revellers at a wild house party in Sydney's south overnight.
A police officer was hospitalised and a teenager has been charged following the out-of-control party in a vacant house at Gymea on Friday night.
Shortly before 8pm officers attached to Sutherland Local Area Command were called to the property on View Street after complaints about the party, police said.
When police arrived, they found about 150 people at the abandoned premises and were attacked with glass bottles and projectiles.
The attack was so intense authorities called in the riot squad, dog unit and police helicopter, before the revellers left the party peacefully.
Later, a police officer was injured arresting a 17-year-old teen who allegedly assaulted a 19-year-old at Gymea Railway Station. Both teens had left the nearby party.
The police officer, who sustained cuts and swelling to his head, has since been discharged from hospital.
Social media users described the scene at the party as police attempted to take control.
Young people who fled Gymea house party say house was unoccupied, fights occurred, every window smashed— Natalie Clancy (@NatClancy7) May 6, 2016
@RedditAus house party at gymea, apparently ambulance took a teenager away— Ashlee Craig (@AshleeeCraig) May 6, 2016
Police want anyone with information about the party to call Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page: https://nsw.crimestoppers.com.au/