Police are resuming an appeal for information to find Kevin Nketia, 15, who is missing from Grays.
Kevin has been missing since May 1 and a number of enquiries to locate him have proved unsuccessful.
Officers are concerned for his welfare and believe he may be travelling by train.
There have been possible sightings of him in Stevenage and Essex Police is working closely with the Hertfordshire force.
He also has links to Bedfordshire and Luton.
Kevin is described as being 5ft 7ins with braided hair and was he last seen wearing a black parka jacket with a fur collar, blue Adidas tracksuit, and black Nike Airmax 95s trainers.
If you have seen him or have any information about where he is please call 101 or Crimestoppers anonymously on 0800 555 111.