A man attends a prayer vigil for the victims of the mass shooting in Dayton of Ohio, the United States, on Aug. 4, 2019. Nine people were killed with 26 others injured early Sunday morning in a mass shooting near a bar in Dayton, a city in midwest U.S. state of Ohio, the authorities said. The gunman was shot dead at the scene by police. (Xinhua/Liu Jie)