Police in Pinole on Monday morning issued a shelter in place for a neighborhood around Shannon Elementary School due to law enforcement activity.
People on Kildare Way between Marlesa Road and Tara Hills Drive and on Barkley Court were advised to lock down in the nearest place of safety, police said. They were instructed to stay inside and close and lock all windows and doors until further notice.
Police said they were negotiating with a person on foot who they believe is armed.
Police also advised residents to stay off the phone and not call 911 unless they need to report a life-threatening emergency.
Suspicious activity should be reported to the Pinole Police Department at 510-724-1111.
No further details were immediately available.
Source: NBC Bay Area