A 32-year-old man needed hospital treatment after he was set upon in a Cumbria street.
The assault happened near Domino's Pizza in London Road, Bochergate, Carlisle, late on Thursday night.
The victim, who is from Carlisle, suffered cuts to his head and mouth. Cumbria Police said the assault was unprovoked.
His attacker was with a group of men. Police are appealing for witnesses to come forward.