Detectives have launched an appeal to find a missing teenage boy. Kassim Adnan Kassim was last seen at about 11.30am on Saturday in the area near Old Watling Street in Gravesend. The 16-year-old is described as having a slim build and dark braided hair. He was wearing black trousers, a white t-shirt and a black hooded top at the last time he was seen. Police believe it is possible Kassim may have used the train network as he has links outside of Kent, to areas in London and Liverpool. Anyone with information on his whereabouts should call 999 quoting reference 10-0488.