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Armed protesters have taken over a federal building in a wildlife refuge in Oregon and vowed to occupy it for “as long as it takes.”

The occupation of Malheur National Wildlife Refuge came shortly after 300 marchers paraded through Burns in support of father and son ranchers who are facing a 5-year prison sentence for setting fire to 130 acres of land.

The protester speaking for the group is Ammon Bundy, son of Cliven Bundy, the Nevada rancher who clashed with the feds two years ago.

"We have no intentions of using force upon anyone, (but) if force is used against us, we would defend ourselves," he said.

Prosecutors accuse Dwight and Steven Hammond of starting the fire to hide poaching, but the ranchers and protesters claim it was set to stop invasive plants.

Oregon State Police, the Harney County Sheriff’s Office and the FBI are working to defuse the situation.

This is a developing story. Read more about it here.

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