Suspicious white powder found in Navy mailroom near Pentagon

About 800 U.S. Navy personnel have been evacuated from a building in Arlington, Va., after a letter was found to contain a suspicious white powder on Thursday morning.  

The letter was found at Commander Naval Personnel, the Navy's office for personnel matters, near the Court House district of Arlington, just a few miles from the Pentagon.

According to a military official, about 800 people were evacuated after a "white powder" was found in an envelope. Arlington country officials are on the scene.

"A suspicious substance was found in the mailroom of Building #12 at Naval Support Facility - Arlington, Va. As a precaution, all personnel are currently being evacuated. The situation is ongoing and currently under investigation and we will provide additional details as they become available," a Navy statement said.

UPDATE: The suspicious substance tested "negative for hazardous material," the Navy said, following multiple test by Arlington County Hazmat Response Team.  "The situation has been cleared and the suspicious letter has been turned over to the Navy authorities and evacuated personnel have been let back into the building."