There is no motive known for the shooting at Saugus High School today and it’s unclear what the connection is between the shooter and the victims other than they attended the same school, Capt. Kent Wegener of the Los Angeles County Sheriff's Department told reporters.

A search warrant has been served at what they believe is the suspect's residence, Wegener said.

There is no history at that address to indicate there were any issues at the home prior to the shooting, the sheriff's captain said.

Paul Delacourt, assistant director of the Los Angeles FBI field office, said there is no reason to believe the suspect was acting on behalf of any other group or ideology or that there were any co-conspirators.