Seven people have been killed and three injured in a shooting at a California college, police say.
Armed officers swarmed Oikos University in the city of Oakland after the mid-morning attack. Bodies covered with tarpaulin were laid outside.
After a huge manhunt the suspect was detained at a shopping centre in the nearby city of Alameda, police said.
Oikos University is a private religious institution offering courses in theology, music and nursing.
One of the people inside the building was saying there is a crazy guy inside�. TV footage showed wounded people emerging from buildings. Johnna Watson, of Oakland Police, said: "We know this to be a Korean college. A gunman came in to the college and fired multiple shots."
The Oakland Fire Department says it was first notified of the shooting at about 10:50 local time. Pastor Jong Kim, who founded the school about 10 years ago, told the Oakland Tribune that the shooter was a former nursing student at the college.
He said he had heard about 30 gunshots in the building, adding: "I stayed in my office."A witness, Brian Snow, told local news station KGO-TV: "One of the people who was inside the building, she was saying there is a crazy guy inside.
"She did say someone got shot in the chest right next to her before she got taken off in an ambulance."
A woman who was doing errands nearby, Angie Johnson, told the San Francisco Chronicle she helped a woman with a gunshot wound in her arm.
The woman "had a hole in her right arm the size of a silver dollar with blood coming down", Ms Johnson told the newspaper.
Ms Johnson also said that, according to the woman, the gunman had stood up during a nursing class, shot one student in the chest at point blank range and then began firing at the rest of the room.
A police officer at the scene told reporters the gunman had not been identified.
Reports described the suspect as a Korean man in his 40s, with heavy build and wearing khaki clothes.
The shooting comes after an Ohio high school student killed three peers and injured six in February.
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