OMAHA, Neb. (AP) — A 56-year-old Omaha man has been convicted of using a telephone to make a bomb threat against a railroad yard in Council Bluffs, Iowa.

A news release from the Omaha office of U.S. Attorney Deborah Gilg says Ronald Martell has been sentenced to time served and ordered to pay restitution of more than $25,000 to Union Pacific Railroad.

Prosecutors say Martell called the Pottawattamie County, Iowa, 911 center on Jan. 6 and said he’d placed three bombs in the Union Pacific rail yard. He made a similar threat against the yard in a call on Jan. 14 to the Douglas County 911 center in Omaha.

Prosecutors say some people who worked in the yard were asked to listen to the 911 call recordings, and the workers recognized Martell’s voice.