OAKLAND, Calif. (AP) - Police surrounded a Christian university in search of a gunman who reportedly opened fire Monday morning and wounded at least five people, authorities said.

The shooting was reported shortly after 10:30 a.m. at Oikos University in east Oakland. It's unclear if there were any fatalities.

Television news footage showed officers surrounding the building in search of the suspect, described as a Korean man in his 40s with a heavy build and wearing khaki clothing. Authorities could not confirm if the suspect was still in the building.

The footage also showed wounded people being carried out of the building, and more gurneys were being brought in.

Oakland police did not immediately return calls.

"One of the people who was inside the building, she was saying there is a crazy guy inside," witness Brian Snow told KGO-TV. "She did say someone got shot in the chest right next to her before she got taken off in an ambulance."

According of its website, Oikos University offers studies in theology, music, nursing and Asian medicine.