Base personnel were instructed to shelter in place after a suspicious package was found in a vehicle that pulled up to the Naval Station Everett base gate Thursday afternoon.
At about 1:15 p.m. security personnel responded to the report of the suspicious package.
Navy Explosive Ordnance Disposal, Everett Police Department, Snohomish County Sheriff, and Washington State Patrol assisted in the response.
As a precaution, one building was evacuated. All base personnel were asked to remain indoors and shelter in place.
Just before 5 p.m., the Port of Everett tweeted that the investigation was complete and an all-clear was given. Traffic in the area returned to normal.