Port Huron police continue to be on the lookout for a man who robbed a gas station at 1035 Lapeer Ave. in Port Huron shortly before 2:00 a.m. Friday.  Reports say a man walked into the gas station, pulled out a gun and demanded cash from the cashier. After receiving the cash, the man fled on foot northbound on 11th Street.  Police are looking for a black man in his 40s, about 5 foot 8 inches tall with a medium build. He was wearing a dark blue hooded sweatshirt and a white baseball cap.  Anyone with information about this incident can call CAPTURE at (810) 987-6688 or go to www.porthuron.org.