They said on their Twitter account: “Have you seen missing Abdullah, last seen at about 6.20pm in Kings Gardens area of Hove on May 17?
"He is described as white, slim, with a goatie beard and shaggy ear length hair.
"He wore a black jacket and jeans and grey sweatshirt.”
Brighton and Hove Police urged anyone who sees him to call 101 and quote 1418 of 17/5.