'I couldn't stop it': Teen sorry after 150 trash vacant house in Sydney
The riot squad, a police helicopter and a dog unit have helped break up a party of 150 people at a vacant house in Sydney's south.
A police officer has been knocked to the ground trying to break up an out of control party in Gymea where children as young as nine smashed windows, doors and walls.
Teens recorded the officers as they broke up the party, sharing it on social media app Snapchat.
Police say several glass bottles and other projectiles were thrown at officers who were trying to identify the organisers.
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More than 150 teenagers descended on the vacant Gymea home after hearing about the party on social media.
Kyle Hood invited his friends to the rental property after he and his mother moved out last week.
"I didn't mean for it to happen, I just like, standing there and I saw everything happening I couldn't stop it," he told 7 News, adding his mother his ropeable.
"She's very upset, she was talking to me just then, I'm going to see her for Mother's Day, so."
Police were called to the View Street property following complaints about a party but the crowd dispersed after the riot squad, dog unit and PolAir arrived as back up.
Police allege a 17-year-old youth assaulted a 19-year-old youth at Gymea Railway Station after leaving the party.
Sutherland LAC Acting Inspector Shane Jessep described chaotic scene of youths on a rampage.
"Violently resisting arrest is of great concern, as is a gathering of a hundred, upward of a hundred young people drinking alcohol," he said.
A police officer was then knocked to the ground while trying to arrest the teenager and he was taken to St George Hospital with cuts and swelling to the head before he was later discharged.
The 17-year-old was to face a children's court on Saturday charged with assault and resisting arrest.
