TOPSHOT - Police block off roads near the location of a shooting in Aberdeen, Maryland, September 20, 2018 after an unidentified assailant opened fire at a warehouse complex north of the US city of Baltimore, killing and wounding multiple people, authorities said. - A lone suspect was in critical condition at a local hospital, according to Harford County sheriff Jeffrey Gahler. Police would not confirm reports that the shooter was a woman, but revealed that the suspect had not been shot by police. (Photo by SAUL LOEB / AFP)