The FBI and other authorities are investigating threats against the family of Army Sgt. Bowe Bergdahl, the American soldier released nine days ago in a deal that also freed five detainees from the U.S. detention center at Guantanamo Bay.
William Facer, FBI spokesman in Salt Lake City, said in a statement that the agency is "working jointly with our state and local partners and taking each threat seriously."
Bergdahl, 28, was held captive by the Taliban-aligned Haqqani network in Afghanistan for five years. The deal for his release has drawn criticism as reports surface that he had become disillusioned by the war and had walked away from his post prior to his capture.
Facer did not detail the threats. Bergdahl hails from Hailey, Idaho, and his parents, Bob and Jani Bergdahl, still live there. Last week city officials abruptly canceled a welcome-home celebration for Bergdahl, citing security concerns.