Humberside Police are investigating a burglary and robbery offence at a flat above the Star pub on Carr Lane, Hull on Tuesday 5 September.
The offender broke into the property at around 5.20am and when the occupant returned home he was assaulted and threatened by the burglar who demanded money. Fearing for his safety the victim handed over cash and the offender left the address.
Detectives investigating the incident have released a CCTV still of a man they would like to speak to in connection with the incident.
The man or anyone who can identify him should call 101 quoting crime reference 16/36611/17 or Crimestoppers anonymously on 0800 555 111.