Ammon Bundy, the leader of the armed occupation at Malheur Wildlife Refuge, has been detained and one person is dead following a confrontation with law enforcement officials Tuesday night.
Officials said it all began with a traffic stop while Bundy and some of his followers were en route to a community meeting in John Day, about 70 miles away.
Shots were fired after FBI agents, Oregon State troopers and other law enforcement agencies made the stop.
Details of the arrest and confrontation remain unknown, but charges are pending related to the group's 25-day takeover of the wildlife refuge.
Bundy and about three dozen of other individuals occupied the wildlife refuge earlier this month after two local ranchers, the Hammonds, were sent to prison for setting fires on federal land.
The Hammonds served no more than a year until an appeals court judge ruled that the terms fell short of minimum sentences requiring them to serve about four more years.
Ammon Bundy said he prayed about the matter and "clearly understood that the Lord was not pleased with what was happening to the Hammonds.