FBI agents have converged on the Oregon wildlife refuge where the last four followers of Ammon and Ryan Bundy remain holed up, the agency confirmed Wednesday night. The FBI's Portland office said agents have been stationed at barricades in front of and behind the area of Malheur National Wildlife Refuge where the remaining occupiers are camping. Negotiations were under way, and no shots have been fired, the bureau said. The remaining occupiers are believed to be: David Fry, 27, of Blanchester, Ohio; Jeff Banta, 46, of Elko, Nevada; and Sean Anderson, 48, and Sandy Anderson, 47, a married couple from Riggins, Idaho.