A 27-year-old man has been arrested after a fight broke out near the Fish Market on Minden Place on Tuesday night.
Two men were involved in the altercation. Police don't think they previously knew each other.
One was wearing grey joggers, while the other had a high-vis jacket on.
One of the men suffered minor injuries during the fight.
It happened at around 9:20pm opposite the multi-storey car park.
Anyone who saw what happened is asked to contact Jersey Police on 01534 612612 or Crimestoppers anonymously on 0800 555 111.