All gates at Naval Base Kitsap Bangor and one Bremerton gate are closed after a man tried to enter the installation without authorization and told base security he was in possession of explosive devices.
Authorities asked people who live near the base or are on base to take safety precautions.
Authorities have established a security boundary, including areas west of Highway 3, east of Clear Creek Road, north of Mountain View Road and south of NW Peterson Road.
People in that area should shelter in place or evacuate until further notice, according to a statement from the Kitsap County Sheriff’s Office.