Robert Nacke told reporters that he knew of no injuries, and authorities gave no immediate information about the gunman or his motive.
California authorities say some students rehearsing a play on the grounds of the veterans home had been locked down when a gunman took hostages. Thornton said she was anxious about how her dad's coping with the stress, considering his age, PTSD and slight dementia.
Larry Kamer says his wife, Devereaux Smith, is a fundraiser for the nonprofit Pathway Home. Pathway Home's program treats veterans of the Iraq and Afghanistan wars with post-traumatic stress disorder.
Events manager Elizabeth Naylor, who was working about 10 miles north of the veterans' home, said she heard waves of emergency sirens. He spoke to her by phone. She posted on Facebook, "Please pray we have about 30 police here at the Vets Home there is a shooter here".
Nobody is known to be injured, he said, but earlier the man and officers fired shots at each other.
- Shots were fired at The Veterans Home of California in Yountville near the dining hall Friday morning, and there are three hostages, according to Napa County Fire. An armored police vehicle, ambulances and several fire trucks were at the scene.
California Highway Patrol Officer John Fransen confirms that there is an active shooter at the Veterans Home in Yountville, north of San Francisco.
Gunman takes hostages at US veterans home
An official from the veteran's home told the news station that it was unclear if the shots were fired from inside or outside the building.
The Yountville facility is the largest veterans' home in the United States, with about 1,000 residents.
A large police presence is in the area.
The Napa County Sheriff's Office says there is police activity going on in the area.
The Napa Valley Register reported an armed gunman, dressed in black with body armor, entered the building and may have taken hostages.
The sheriff's department did not immediately respond to a telephone call from The Associated Press.
"Everyone is just in alert mode, and we're taking information as it comes", state Department of Veterans Affairs spokesman Joshua Kiser told the Los Angeles Times in a phone interview from his office on the home's grounds.