(CNN) -- A 15-year-old sophomore, accused of holding 23 classmates and a teacher hostage for about five hours Monday at his northeast Wisconsin high school, fired his two weapons at least five times and had a duffel bag containing more bullets with him, authorities said Tuesday.
The alleged hostage-taker was in grave condition from a self-inflicted gunshot wound, said Marinette, Wisconsin, Police Chief Jeff Skorik. The teen turned one of his guns on himself as police broke into the Marinette High School classroom after hearing gunshots.
He initially was taken to a Marinette hospital, then later transferred to a hospital in Green Bay, Wisconsin, Skorik said. Authorities would not identify the suspect because of his age, Skorik said. Police have not yet talked with him, and Skorik would not say where the youth was shot.
All 24 hostages were unharmed. Skorik said Tuesday that police are still trying to determine a motive, saying the student was well-liked, had no prior law enforcement contact and "was a good student." Authorities interviewed the teen's parents Monday night, he said, and all accounts are that this was "uncharacteristic for this young man".
"This student has a clean slate," Superintendent Tim Baneck told reporters Tuesday. CNN