Police are appealing for information to help try and find a 16-year-old boy from Chorley who has been reported missing.
Callum McAllister was reported missing on November 13 2012 from his home in Chorley and has not returned since.
The last confirmed sighting was on Shakespeare Terrace in Chorley at 3pm on Monday 18th November.
Sergeant Victoria Bates said: “Callum is vulnerable due to his age and the longer he is missing, the more concerned we are growing for his welfare.
“We think that Callum is most likely to still be in the Chorley area so I would appeal to people locally to be vigilant and to report any sightings to us.”
Callum is described as being a white, around five feet tall, medium build with dark brown collar length hair. He is clean shaven with hazel eyes.
Anyone who has seen Callum in the past week or with any information about his whereabouts should contact Lancashire Police on 101.