An assailant armed with a rifle opened fire in a downtown district of Dayton, Ohio, early on Sunday, killing nine people and wounding at least 16 others in the second deadly mass shooting in the United States in less than a day.

Police said they intervened to end the violence, leaving the shooter dead.

Assistant Police Chief Matt Carper said the incident began at 1 a.m. local time in Dayton’s Oregon District, a downtown historic neighborhood known for its nightclubs, bars, art galleries and shops.

The motive behind the shooting was not immediately clear and that investigators believed the individual had acted alone, Carper said.

Source: Reuters