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 said police recovered the weapon, a .45-califber gun, they believe he used during 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.