Police are appealing for information after part of a man’s thumb was allegedly bitten off during a brawl at an inner Brisbane bar.

A 48-year-old man got into a fight with a 53-year-old at Cru Bar in Fortitude Valley in the early hours of April 14.

The younger man allegedly had part of his thumb bitten off during the altercation.

Both men are assisting police with enquiries but officers want to speak with two people who may have witnessed the fight and the events leading up to it.

Security footage has been released showing a man and a woman were sitting nearby.

We’d like to speak with two people who may have witnessed the circumstances leading up to a man having part of his thumb bitten off during a bar fight in Fortitude Valley back in April. Is this you? Or do you know who they are? https://t.co/2roi1DUpu1 pic.twitter.com/O7sX3Zlumm

— Queensland Police (@QldPolice) June 10, 2018