A female police officer has been treated for minor injuries after an assault at an out-of-control party in Melbourne's east.
Police were called out to the party around 10.30pm on Saturday night with the Bayswater host shutting the event down.
Dozens of youths then spilled out onto the street and were seen fighting each other.
It's alleged a male teen assaulted the officer before he was arrested.
The teen spent Saturday night in custody and charges are pending.