Hostage Taken at Discovery Channel Headquarters

SILVER SPRING, MD - A man with an explosive device has taken a security guard hostage at the Discovery Channel Headquarters in suburban Washington, D.C. The Washington Post is reporting a man entered the building's main entrance "wearing what appeared to be metallic canister devices on his front and back."

"He also pulled a handgun out and was waving a handgun," police said.

Silver Spring Police Chief. Chief J. Thomas Manger said police haven't confirmed whether any shots were fired inside the building.