A man has sustained facial injuries following an alleged altercation involving several men inside Braddon bar, Hopscotch, and ACT Police are seeking witnesses.

Police say they have spoken with some witnesses, but believe there were other bystanders in the area and that some may have filmed the incident on mobile phones.

The incident occurred on April 28, around 12.40am, say police.

Two men, a 20-year-old and a 24-year-old, have been charged with affray and will face court next month. 

Call 1800 333000 or report via the Crime Stoppers ACT website.