Six suspicious packages were intercepted at various military intelligence sites in the DC area Monday.

The FBI seized the packages that were stuffed with explosive components such as black powder, fuses, and circuit boards.

An X-ray also found what appeared to be a GPS and a fuse.

The building was evacuated and later cleared around 1:15pm.

'At 12:10 p.m., 52nd Army Explosive Ordnance Disposal from Fort Belvoir, VA, confirmed the package tested positive for black powder and residue, Army spokesman Michael L. Howard said in a statement.

'The X-ray conducted indicates suspected GPS and an expedient fuse were attached. The package was rendered safe. No injuries are reported,' he added. 

Parcels arrived to two sites at Fort Belvoir in Virginia in the afternoon, addressed to The National Geospatial-Intelligence Agency and the defense university.

One of those packages contained liquid in a vial and a circuit board, according to law enforcement officials.

Another package was found Dahlgren Naval Air Station in Virginia.

A CIA mail processing facility and a White House mail processing facility also intercepted suspicious packages.

It is not clear if the parcels all contained working explosives.

Some of the deliveries were also accompanied with some long letters, described as rambling and disturbing, according to officials.

Officials do not believe the packages are linked to the bombings in Austin, Texas.

It is not yet clear if the packages are all linked to one another. 

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