Authorities said at least 15 to 20 shots were fired in Building G, starting about 10:30 a.m.
The Veterans Home posted on their Facebook page that emergency response protocols were activated and they are working with law enforcement.
Jan Thornton of Vallejo, California, was among hundreds of relatives anxious how their loved ones were coping with the lockdown. She said she's lived in Yountville since 1995 and is rattled about a shooting so close to home. Kamer's wife, Devereaux Smith, is a fundraiser for the nonprofit Pathway Home and was at the party.
He does not know if the shooter was a veteran receiving treatment from the home.
He said he did not know if the shooter was a veteran receiving treatment from the home.
An armored police vehicle, ambulances and several firetrucks could be seen at the scene.
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 veterans home is an important part of the Napa Valley Community, with the 1,200-seat Lincoln Theater, a golf course and a large library, CalVet said.
The sheriff's department did not immediately respond to a telephone call from The Associated Press.
The home, which houses around 1,000 Iraq and Afghanistan veterans, has been put into lockdown as authorities surround the property. Residents from the home often golf at the club for free, said Jason Boltt at Vintners.