MILL VALLEY, Calif. (KTVU) - Police activity in Mill Valley prompted a lockdown at two schools Monday afternoon after reports of a suspicious man in the area.
Police Chief Al Piombo said at least three people called 911 to report a man behind Tamalpais High School on Homestead Boulevard. They said he was dressed in all black and wearing a ski mask. One caller said they thought the man had a gun.
As a precaution, the high school and a nearby middle school were placed on lockdown. Residents in the area were asked to shelter in place.
Officers searched every room at Tamalpais High School and found nothing.
At around 4:01 p.m. the lockdown and shelter in place were lifted and students were released from school as usual.
Officials said all students were safe.
Officers are searching for a white vehicle that was in the area and possibly linked to the incident.