Nevada rancher Cliven Bundy, the father of the jailed militia leader whose followers have occupied a federal wildlife refuge in easte Oregon for the past 40 days, was arrested by FBI agents in Portland, Ore. late Wednesday as he stepped off a flight from Las Vegas.

Bundy's arrest was confirmed on the website of the Multnomah County Sheriff's Office, which said he had been taken to the Multnomah County Detention Center.

The Oregonian newspaper reported that Bundy faces charges related to the 2014 standoff between federal agents and militia members on his Nevada ranch. The charges include conspiracy to interfere with a federal officer, the same charge lodged against two of Bundy's sons, Ammon and Ryan, for their role in the ongoing standoff at the Malheur National Wildlife Refuge.

The FBI confirmed Cliven Bundy's arrest but declined to provide a reason or other details, saying further information would be released by the U.S. Attoey's office in Las Vegas Thursday.

The Oregonian also reported that Bundy had traveled to Oregon to demonstrate in support of the four remaining holdouts occupying the refuge. The group said earlier Wednesday that they would tu themselves in Thursday moing.

The Bureau of Land Management said at the time of the 2014 standoff that Bundy owed over $1 million in fees and penalties for trespassing cattle on federal property without a permit over 20 years. Bundy refuses to acknowledge federal authority over public lands.

The standoff began after the BLM impounded Bundy's cattle that were found on federal property. However, federal agents later backed down and allowed Bundy's supporters to tu the cattle loose.

Click for more from The Oregonian.