A double shooting late Sunday night injured two people, and police continue to look for the suspect who fled the scene on foot, police said. Police responded to 115 Salem St. at 11:37 p.m. after reports of shots being fired. Police said they observed two men on the ground suffering from gunshot wounds. The victims were taken to local hospitals; one of the men was eventually transferred to a Boston hospital. The scope of their injuries was not immediately available.