A gunman has opened fire at a private Christian college in Oakland, killing at least seven people and wounding three others.
Police in the Californian city said a suspect, reportedly a former student, has been taken into custody.
Oakland city officials said they believed the gunman had acted alone in the shooting at Oikos University, but did not identify him and declined to offer a motive for the attack.
The school's founder, Pastor Jong Kim, told the Oakland Tribune newspaper that the man arrested at a shopping centre about 8km from the scene had previously been a nursing student there, but was no longer enrolled.
Mr Kim told the newspaper that he heard about 30 gunshots.
"As you may have heard, the suspected shooter in today's deadly shooting at Oikos University on Edgewater Drive is in custody, and it appears he acted alone," the city council said in a statement.
"The surrounding area is still cordoned off, but police have advised that no imminent public safety threat appears to exist in the immediate area," it said.
Oikos, which offers programmes in theology, nursing, music and Asian medicine, describes itself on its website as having been started to provide the "highest standard education with Christian value and inspiration".
