Washington: One hostage has been taken by a man with a handgun at the Discovery Channel headquarters building in suburban Washington, Montgomery County police told ABC television on Wednesday.
A reporter from the local ABC affiliate said an ambulance crew wheeled a gurney into the building about an hour after the incident began at 1 p.m. EDT, but there was no official word of casualties.
Earlier, Police Corporal Dan Friz said he could not confirm gunshots were fired in the building in Silver Spring, Maryland, as a Discovery employee had told the local ABC television affiliate.
Employees told local television that the building had been evacuated after a lockdown and children were taken out of the daycare center.
Police were watching the suspect on the building`s closed-circuit security system and Discovery employees posted updates on the situation on Twitter.
Roads in the normally busy urban center at the intersection of Colesville Road and Georgia Avenue on the edge of Washington were closed and police cars and emergency vehicles blocked access. Witnesses said SWAT teams and law enforcement from several areas were at the scene.
Discovery Communications said it reaches 1.5 billion subscribers in more than 180 countries with the Discovery Channel, TLC, Animal Planet, Science Channel and Planet Green networks.