Rutherford County Sheriff's depuites and Murfreesboro Police monitor Murfreesboro's Public Square after a bomb threat was called into the Judicial Building. TMP/J. Fagan

The Rutherford County Judicial Building was evacuated Thursday morning after a bomb threat was called in to the Rutherford County Deputy Circuit Clerks Office.

The caller reportedly said there were three bombs in the building and “someone is going to kill Judge (Don) Ash,” Rutherford County Sheriff Robert Arnold said.

“The judges are in a secure, undisclosed location,” Arnold said.

Arnold said deputies have searched the building three times and have found nothing yet. So he has called for bomb-detecting dogs from the Tennessee Highway Patrol and the Nashville office of Alcohol, Tobacco and Firearms.

The Sheriff's Office began evacuated the building and the north side of the Public Square and began a search after the call was received at 8:45 Thursday morning.

"Bomb threats are pretty rare," RCSO spokeswoman Lisa Marchesoni said about the situation at the Judicial Building, "but we take them seriously and take all the necessary precautions to make sure everyone is safe."

Marchesoni also said the Sheriff's Office doesn't have any suspects yet, but deputies are actively working the case.

Arnold said the evacuation was hampered because the public address system in the Judicial Building is out of order.

Court was expected to resume at 1 p.m.

Murfreesboro Police and Fire Department are on the scene as well.

The Murfreesboro Post will update this story as more details become available.