A 43-year-old former student of a small Christian university in California opened fire at the school Monday, killing at least seven people and setting off an intense, chaotic manhunt that ended with his capture at a nearby shopping center, authorities said.

Police Chief Howard Jordan said One L. Goh surrendered about an hour after the shooting at Oikos University. Jordan initially reported that authorities recovered the weapon used during the rampage, but later clarified that police only recovered enough ballistics evidence to determine that a handgun was used in the rampage.

"It's going to take us a few days to put the pieces together," Jordan said. "We do not have a motive."

Police first received a 911 call at 10:33 a.m. reporting a woman on the ground bleeding. As more calls came in from the school, the first arriving officer found a victim suffering from a life-threatening gunshot wound, he said.