Police officers on routine patrol nearby were on the scene in less than a minute and shot the attacker dead moments after he opened
fire, likely preventing a much higher casualty toll, authorities said.
"Officers acted ... instantaneously and effectively ended this in 30 seconds," Police Chief Richard Biehl said during a news conference.
Police named the gunman as Connor Betts, a 24-year-old white male from Bellbrook, Ohio, and said he was armed with an assault-style rifle fitted with an extended drum magazine that could hold 100 rounds.