Washington State Police said that the Puget Island Bridge will be closed to traffic while a bomb squad from Everett, Wash., investigates a suspicious package.

The Puget Island Bridge South is located on SR 409 outside of Cathlamet, Wash., at milepost 0.

Police said a black backpack appeared to be intentionally tied to the bridge.

The bridge is closed to vehicle traffic and is expected to remain closed until 6 p.m. Saturday.

There is currently no detour route available. The ferry system has been notified of the closure.

The coast guard is patrolling the waterway and keeping boats away from the bridge.