Los Angeles County Sheriff Alex Villanueva tells KNX radio the suspect in the Saugus High School shooting is in custody.
The sheriff says the suspect is a student and was one of several people taken to a hospital after the Thursday morning shooting and is alive.
Reports on the number of people injured has fluctuated.
Henry Mayo Newhall Hospital tweets it received four patients. The hospital says a female and two males are in critical condition and one male is in good condition.
School district spokesman Dave Caldwell tells the station all campus lockdowns in the district have been lifted except for Saugus High.
More to come