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Militia members occupy Malheur National Wildlife Refuge in Oregon

A group of militiamen occupied a federal building at an Oregon wildlife refuge late Saturday and vowed to stay there indefinitely to protest rancher rights.
Ammon Bundy, son of rancher Cliven Bundy, talks about being tasered in Bunkerville, Nev., April 11, 2014. (Photo by Jim Urquhart/Reuters)
Ammon Bundy, son of rancher Cliven Bundy, talks about being tasered in Bunkerville, Nev., April 11, 2014. 

A group of militiamen occupied a federal building at an Oregon wildlife refuge late Saturday and vowed to stay there indefinitely to protest rancher rights.

The standoff came after protesters and militia members converged on the small town of Burns to show support for a pair of ranchers jailed on an arson conviction,according to NBC affiliate KTVZ.

After a march and rally there, a small group then took over the Malheur National Wildlife Refuge headquarters about 60 miles away.

Ammon Bundy — son of Cliven Bundy, the Nevada rancher known for his 2014 standoff with the federal government — was among them.

After issuing a Dec. 31 video message urging "patriots" to "stand up" and report to the refuge, Bundy said in a new video posted to Facebook late Saturday that his group was there and prepared to stay for "as long as it takes."

"We're prepared to be out here for as long as needs be," Bundy said in the video posted on Facebook. "Once they can use these lands as free men then we will have accomplished what we came to accomplish."

Bundy later told NBC affiliate KTVZ that "it's the people's facility — owned by the people."

"And it has been provided for us to be able to come together and unite in making a hard stand against this overreach — this taking of the people's land and resources," Bundy said.

He stressed the protest was peaceful, saying his group poses "no threat to anybody."

But the protests were making some Burns residents uneasy.

"It's sort of frightening when there are people making threats and people toting guns," resident Kainan Jordan told KTVZ. "We're not used to this kind of thing here."

Largely, the protesters sang, toted signs and American flags and threw pennies at the Harris County Courthouse, which was symbolic of their effort to buy back their government, according to The Associated Press.

The FBI said it was aware of the situation but declined to comment further. NBC News was unable to reach local officials for further comment.

The case which sparked the initial protest involves Dwight Hammond, 73, and his son Steven, 46, who set fires that spread to government lands they leased to graze cattle.

The Hammonds — who said they lit fires in 2001 and 2006 to reduce the growth of invasive plants and protect their property from wildfires — were convicted and served time for arson.

However a judge later ruled their sentences — three months for the father, one year for the son — were too short and ordered them back to prison. Prosecutors argue that the blaze, which burned 127 acres, was a cover-up of poaching.

The Hammonds are due to report to jail on Monday, according to KTVZ.

Cliven Bundy urged the Hammonds to turn themselves in, but said in a statementthat "the United States Justice Department has NO jurisdiction or authority within the State of Oregon, County of Harney over this type of ranch management."

Bundy told Oregon Public Broadcasting on Saturday that "the people had to do something," but he wasn't a part of the protests.

On Saturday, supporters also gathered outside the elder Hammond's home and hugged him and his wife one-by-one in a display of solidarity, KTVZ reported.

"It isn't my decision, obviously. It's a sentence," Hammond said, adding that he appreciated the support from the protesters.

"I thank everyone who came out here today," Hammond said. "See you in five years."

This story originally appeared on NBCNews.com.