Two males suffered facial injuries when they were assaulted by a pair of young men near an underpass in Canberra's south on Saturday night.
Police said a group of four people, three male and one female, were walking near the underpass on Namatjira Drive in Weston, near McDonalds, around 9pm when two young men approached them from behind.
The pair assaulted two of the male people in the group and caused serious facial injuries. ACT Policing did not release details of how old the victims were.
Police believed the offenders were attending the ACT Jam 2016 BMX riding event at Weston Creek Skate Park.
One of the offenders was described as being in his late teens or early twenties, with a dark complexion.
The second offender was also believed to be his late teens or early twenties and tall, with a fair complexion and slim build.
ACT Policing has urged any witnesses to contact Crime Stoppers anonymously on 1800 333 000, or at act.crimestoppers.com.au. Quote reference number 5952304.