The country’s largest veteran’s home was placed on lockdown for an “active shooter” – three years after shooting there left three dead.
Heavily armed police responded to the Veterans Home of California in Napa County, after reports of a woman with a shotgun on the campus.
California Highway Patrol say there have been no confirmed shots fired at the facility in Yountville, California.
“This morning the CHP received a report of what appeared to be a woman at Veterans Home of California – Yountville with what the caller described as a shotgun,” said CHP in a statement.
“CHP and multiple allied agencies immediately responded and are currently conducting an extensive search via ground and air in an attempt to locate the possible subject.
“There have been no reports of any shots fired or any additional reports of the subject.”
The incident came the day after a gunman killed 10 people, including a police officer, in a mass shooting at a grocery store in Boulder, Colorado.
The Yountville home offers residential accommodation for 1,000 aged or disabled military veterans from World War II to the conflicts in Iraq an Afghanistan.
In 2018 a murder-suicide at the site’s Pathway Home, a residential therapy programme, left three female staff members and an unborn baby dead.
The shooter Albert Wong, 36, a US Army veteran who had been dismissed from the home earlier in the week, was also found dead after an exchange of fire with law enforcement.