A man was left with a broken leg and a punctured lung following a bar room brawl in Hornsey.
Two men were attacked in the Moors Pub, in Park Road, at around 3am on March 2.
The fight began inside the pub before spilling out onto the street. One man suffered a punctured lung and a broken leg and a second man sustained an injury to the face.
The suspected attacker is a white man, aged 30, of heavy muscular build with red or ginger hair and tattoos on both arms.
Anyone who either witnessed or has information concerning this incident should contact Detective Constable John McGranahan of Wood Green CID on 020 3276 3075 or call Crimestoppers anonymously on 0800 555 111.