A 16-year-old girl has been assaulted after a group of teenagers gatecrashed a party in Sydney's north-west.
The girl was pushed over and punched in the head several times, but did not require any medical treatment.
Property was also destroyed, with pot plants used to smash the windows of the family car and the mailbox torn out of the ground.
It is understood that the parents of the 16-year-old hosting the party were not home when the incident happened.
The party started to get out of control at around midnight, with roughly 15 teenage boys turning up at the home.