Police are appealing for witnesses after a 25-year-old Grimsby man was assaulted in the street on October 1.
The incident happened just before midnight as the victim walked along Albert Street.
He suffered lacerations and bruising to his head in the attack.
Anyone who witnessed the attack or has information that would help with investigations is being asked to call the non-emergency number 101 quoting reference 2218515.
People can also call Crimestoppers anonymously on 0800 555 111.