Police detained a suspect after a 9:10 a.m. Thursday shooting at the main post office in Des Moines, Iowa, that injured at least three people.

Officers arrived three minutes after the calls. Sergeant Paul Parizek observed no signs of life-threatening injuries, and one of those hurt drove to the hospital independently.

Reports placed the shooting on the second floor, and officers arrested the suspect just east of the post office while more law enforcement responded per protocol.