Authorities are looking for a man accused of robbing a Port Huron Township gas station Sunday morning. According to the St. Clair County Sheriff’s office, a suspect is believed to have held up the Speedy Q store in the 2000 block of Water Street. Deputies were called to the store after central dispatch received a hold-up alarm from the store shortly before 5am. According to store employees, the suspect had brandished a handgun and demanded the cash register to be opened. The suspect is described as a black male, about 5-foot 8-inches tall with a thin build. He was wearing a black hooded sweatshirt and fled the scene on foot. Those who may know the whereabouts of the suspect are asked to call the Port Huron Police Major Crimes Unit or the CAPTURE tip line a 987-6688.