Officers were called to the unit in Smithsburg around 2:30 pm (7:30 pm GMT) on Thursday. The Washington County Sheriff’s Office said three people were killed and one was seriously injured. A police officer who tried to chase the gunman had also been shot in the shoulder. Sergeant Carly House said the suspect had fled until police arrived, but was found in a vehicle about five miles from the factory. Image: Photo: NBC4 Washington There, “an exchange of gunfire took place” that resulted in the wounding of a Maryland police soldier. The suspect was shot, injured and taken to hospital after the “confrontation”. Smithsburg, a community of nearly 3,000 people, is located about 75 miles northwest of Baltimore, not far from Maryland’s Pennsylvania border. The shooting comes less than two weeks after 21 people were killed when Salvador Ramos, who dropped out of high school, opened fire on an elementary school in the small Texas community of Ulvade.