Police believe a man missing from home may be in Blackpool or Fleetwood.
Rizwan Shah, 26, from Blackburn, was last seen in the town on December 7, but has not made contact with anyone since then and police are growing increasingly concerned for his welfare.
Rizwan, left, is described as being Asian, around 6ft 2in tall and of slim build.
He has short, black hair and has a tattoo on his right arm.
Officers believe Mr Shah may have made his way to either of the two towns.
Inspector Ilyas Mohmed said: “We are growing increasingly concerned for Mr Shah’s welfare and would ask the public to be vigilant and report any sightings to the police.
“Any details could be crucial.”
Anyone with any information should contact police on new non-emergency number 101.