Honolulu police are searching for a man who held up a 7-Eleven store on the corner of Kalihi Street and Nimitz Highway early Thursday morning. Police say a masked man entered the store armed with a handgun at about 3:15 a.m. He took off with cigarettes and fled westbound on Nimitz Highway. Two clerks were working at the time. They were not injured. The suspect is described as heavy set, about 5'8" to 5'9" tall. He was dressed in all black.