Discovery Channel HQ hostages freed as gunman shot dead

A gunman who took three hostages at the Discovery Communications headquarters in the US has been shot dead by police and his captives have been set free.

The man had canisters strapped to his chest and a handgun when he entered the building near Washington DC, police said.

Officers opened fire because they thought the gunman was about to detonate his explosives, they added.

The police had held several hours of talks with the man.

Discovery employees were evacuated from the building shortly after the incident began at about 1700 GMT.

The area around the building in Silver Spring, Maryland, was sealed off as police negotiated with the man. After several hours, police began to fear for the safety of the hostages, said Montgomery County Police Chief J Thomas Manger.

He said a man had entered the Discovery headquarters through the main entrance wearing what appeared to be "metallic canisters" on his clothes.

The man then pulled out a handgun and told everyone to remain still.

Unnamed police officials quoted by the US media named the gunman as James Jay Lee, a man in his 40s known for protesting outside the building.

The US broadcaster NBC reported that one of their producers had a brief telephone conversation with the gunman while he was holding the hostages.

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