The rifle-wielding man entered the cinema in Viernheim, near Frankfurt in western Germany, shortly before 3 p.m. local time, Hesse Interior Minister Peter Beuth said.
After the ordeal ended, a Viernheim police spokesman told CNN that no one was injured by gunfire aside from the attacker.
The cinema is part of a major shopping center called Rhein Neckar Zentrum Viernheim.
An employee at Coyote Café Viernheim, just across from the cinema, said about 50 to 100 officers rushed to the scene.
“This is something very unusual for our town. I’ve never seen anything like that. I never want to see anything like that again.”
Late Thursday afternoon, the shopping complex announced the police operation was over.
The motive for Thursday’s attack remains unclear, but German police said t’s no indication the incident was terror-related.
Prior to the attack, police had repeatedly warned that Germany could be targeted by ISIS. Germany absorbed more than 1 million refugees last year, and t have been concerns about the possibility of ISIS cells in the country.