Hostage in Discover channel headquarters Building in suburban Washington, at US 

Maryland police are responding to a hostage situation after a man with hand gun and Bombs entered into the Discovery Channel headquarters building in Silver Spring and started firing.
Montgomery County Police confirmed that one man with an Explosive device holding one person as hostage in the lobby of the Discovery channel building.

Discovery Channel located in suburban Washington was on lockdown.

Hearings of five or six   gunshots reported yet.
Montgomery County Police reportedly told that team is trying to communicate with gunman.