Have you seen this guy?

Police say he's the robber who killed store clerk Moustafa Shaker during a stickup inside a North Philadelphia convenience market early Thursday.

Quasheam Richburg, 20, of Ridge Drive off of 27th Street in North Philadelphia, faces murder charges in the 3 a.m. attack on Shaker, 50, inside Trax Foods, a market under the El station on Front Street near Girard Avenue.

Shaker, an Egyptian immigrant and father of two, was on the midnight-to-8 shift at Trax Foods when two gunmen stormed the store early Thursday and announced a robbery. Shaker refused to give them money, so one shot him in the face. He died on the scene. Another store clerk was uninjured.

Police urge anyone with information on Richburg's whereabouts to call homicide detectives at (215) 686-3334 or call 9-1-1.