ROCHESTER, N.Y. (AP) — Authorities say a 53-year-old Rochester man has been sentenced to a year and eight months in prison for threatening to kill a federal prosecutor.

The U.S. Attorney's Office in Rochester says Tony Ivey was sentenced Tuesday to 20 months in a federal prison for threats he made against an assistant federal attorney in June 2016. He pleaded guilty to the charges in December.

Officials say Ivey called the U.S. Attorney's Office in Rochester twice on June 14 and threatened to kill an assistant U.S. attorney with an assault rifle. Officials say the threats were made after Ivey was told by the attorney that he couldn't directly help him with a complaint and referred Ivey to another agency.