>> A Seattle man has been charged in federal court for shipping a series of packages containing explosive materials to government agencies throughout Washington, DC. Thanh Cong Phan was arrested at his home in Everett, Washington on Monday after FBI officials used a tracking number on one of the packages.

FBI units, state troopers, US postal inspector police, and an FBI bomb tech remained at Phan's home through out Tuesday.>> To do a search of the residence of Mr. Phan. And we're looking for any material that might be linked to these charges of sending a explosive device through the mail.

>> Officials say one of the packages delivered at Fort Lesley J McNair in Washington, DC tested positive for an explosive residue.>> And there was a wick that goes down into the glass vial that would have been sufficient if caught on fire, set on fire, would cause possible explosion.

>> This is not Phan's first run in with the law. Officials say the 45 year old was arrested in 2011 for stealing a car and taking police on a nearly hour long chase. Officials say Phan is believed to have mental problems.