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The Freeborn County courthouse was evacuated Thursday afternoon after authorities received a report of a bomb threat on 911.

Sheriff Ryan Shea said shortly before 2 p.m. a 911 came into dispatch from a 911-only cell phone. The male caller’s voice was distorted but stated there was a bomb and that he wanted $1 million and would call back with more information.

Staff were evacuated from the building, and dispatch was moved to another location.

Shea said authorities conducted a protective sweep to make sure all people were out of the building, and at that time did not find any suspicious packages.

Bomb-detection dogs were called in from Olmsted County Sheriff’s Office and the Rochester Police Department to check the entire building.

The Sheriff’s Office issued the all-clear for the building at about 5:30 p.m.

The investigation into the origin of the call is still on going.