Authorities say that military offices received suspicious packages on Monday, and one contained explosive material.
Here's what we know so far
Authorities say at least three military sites have received suspicious packages. The FBI has control of those packages.
National Defense University on Fort McNair
The university in Southwest Washington D.C. received a suspicious package and was evacuated as a precaution.
"At 12:10 p.m., 52nd Army Explosive Ordnance Disposal from Fort Belvoir, VA, confirmed the package tested positive for black powder and residue," said Army spokesman Michael Howard 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."
Naval Support Facility Dahlgren
The facility in King George County, Virginia, received a suspicious package but officials say it was "found to be safe."
The fort in Fairfax County, Virginia, also received a suspicious package and it was rendered safe as well.
Here's a CNN news report about the packages:
Authorities must be on edge over suspicious packages since a man killed himself before being apprehended by police in the investigation of several lethal mail bombs in the Austin, Texas, area. The bomber left a 25 minute message on his phone, according to police, and appeared to dispel politics or religious terrorism as a motive for his attacks.