A man needed treatment at hospital after an "altercation" took place in a Sunderland bar over the weekend.
Police were told of reports of concern for a man at Ttonic, in the Vine Place area of the city centre, in the early hours of Sunday.
Officers attended the scene and a man was taken to hospital with "non-life-threatening injuries".
A Northumbria Police spokesman said: “At 2.06am yesterday, police received a report of concern for a male at Ttonic, on Vine Place, Sunderland.
“It is believed that two individuals were involved in an altercation at the premises.
"Officers attended and a man was taken to hospital with non-life-threatening injuries.
“Inquiries are ongoing.”