BURNS, Ore. — Federal and state law officers arrested the leaders of an armed group occupying a national wildlife refuge, during a traffic stop along a highway in Oregon’s frozen high country that prompted gunfire and left one man dead.

Militant leader Ammon Bundy and his followers were reportedly heading to a community meeting at the senior center late Tuesday afternoon in John Day, about 70 miles north of Burns, to address local residents to discuss their views on federal management of public lands.

In a statement, the FBI and Oregon State Police said agents had made a total of eight arrests — including Ammon Bundy.

Oregon State Police confirmed that its troopers were involved in the traffic-stop shooting. One of those arrested, described only as a man, suffered non-life-threatening wounds, the agencies said. Another man “who was a subject of a federal probable cause arrest” was killed, they said. The agencies said they would not release further information pending identification by the medical examiner.

The Oregonian reported that Arizona rancher Robert “LaVoy” Finicum was the person killed, citing the man’s daughter. The 55-year-old was a frequent and public presence at the Malheur National Wildlife Refuge, often speaking for the group at news conferences.

Arianna Finicum Brown confirmed her father’s death to the paper, saying “he would never ever want to hurt somebody, but he does believe in defending freedom and he knew the risks involved.”

It was unclear how many people remained in the buildings at the refuge. Late Tuesday night there was no obvious police presence there and Oregon Gov. Kate Brown asked for “patience as officials continue pursuit of a swift and peaceful resolution.”

Early Wednesday, the FBI and Oregon State Police established a series of checkpoints along key routes into and out refuge. The agencies said in a statement that the containment was to ‘better ensure the safety of community members.” They said the decision was made out of an abundance of caution. According to the statement, only Harney County ranchers who own property in specific areas will be required to show identification and be allowed to pass.

Brand Thornton, one of Bundy’s supporters, said he left the refuge Monday and wasn’t sure what those remaining would do.

“The entire leadership is gone,” he told The Associated Press in a telephone interview. “I wouldn’t blame any of them for leaving.”