Joe Morris, 24, is wanted following an aggravated burglary in Colne on August 12 in which the occupant was assaulted and suffered a broken jaw.
Morris, who is of no fixed address but has links to Colne, is described as white, 5ft 8ins tall, of a slim build, with light brown/blonde hair.
Det Con Andy Turner, of Burnley CID, said: “Morris is wanted in connection with an extremely serious offence and we need to speak to him urgently.
“I would advise anyone who sees Morris not to approach him but to call police straight away.
“I would also appeal to Morris himself to get in contact with officers or attend his nearest police station if he sees this appeal.”
Anyone with information on Morris’s whereabouts should email firstname.lastname@example.org or call 101, quoting log 1820 of August 12, 2020.
For immediate sightings call 999.