A 43 year old man from the western U.S. state of Washington is under arrest for allegedly sending several suspicious packages to U.S. military and intelligence installations in the Washington, D.C. area.
The FBI said Thanh Cong Phan was arrested at his house in Everett, Washington.
Phan's motive has not been determined, but the FBI said there was no connection to terrorism.
More than a half dozen packages were shipped to several military bases in the Washington area and the Central Intelligence Agency (CIA).
Court records show that Phan, who has raised concerns over his mental health in the past, has had a couple of run-ins with law enforcement dating back to his teen years.