Bangkok, Thailand (CNN) -- Fifteen people were killed Saturday in clashes between anti-government protesters and Thai police and military forces, according to emergency officials.

Erawan Emergency Center said 11 were civilians and four were military. At least 486 people were injured, the center said.

A Japanese cameraman with Thomson Reuters was among those killed, the news agency said. It identified him as Hiro Muramoto and said that he had been shot and killed.

Military and police forces used tear gas and rubber bullets to contain the protesters, who were trying to break into military barracks, state media reported. Video showed the protesters throwing objects at the security forces, who protected themselves with shields.

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