Update (6:09 p.m. EDT): The AP now reports seven people have died and three were injured in the shooting. Police still haven't discussed a motive.
Update (5:27 p.m. EDT): The Tribune has a little more information on Oikos University, a non-profit Christian school "affiliated with the Praise God Korean Church in Oakland and Shepherd University of San Francisco." Situated in an industrial park in East Oakland and founded in 2004, it offers programs in Asian medicine, nursing, religion, and music.
Update (5:19 p.m. EDT): California Beat is now reporting nine people were shot, of whom six have died, according to Oakland City Council President Larry Reid. The suspect in custody hasn't been named, but he's described as an Asian man in his 40s who wore khakis. Highland hospital has confirmed four victims arrived there for treatment, but has declined to offer any more comment to the various media covering the story.
Original: Police and reporters are still trying to figure out exactly what happened when a former nursing student opened fire at a religious school in Oakland, California on Monday, in one of the deadliest school shootings ever to hit California. At least four people were killed, though the Associated Press reports five, and a suspect has been detained, but not necessarily arrested, after someone walked onto the campus of Oikos University and opened fire. Meanwhile, authorities are still searching the school for more victims. The Oakland Tribune's office has even been locked down, reporter Matt Krupnick tweeted.