The suspect, armed with a rifle, exchanged fire with a responding Napa County Sheriff's Office deputy at the Yountville Veterans Home. California Highway Patrol (CHP) Golden Gate Division Chris Childs reported that the suspect was eventually contained in a room together with three hostages.
Several agencies, including, according to some reports, the FBI were involved in attempts to resolve the situation, but the suspect remained silent.
Napa County Sheriff John Robertson said that the police knew the identity of the shooter, but refused to release the data.
The three hostages were reportedly not residents of the facility, the largest veterans home in the United States, but employees of an organization that provides mental health services.