Bomb threat prompts evacuation of Loop building: police

Authorities are investigating a bomb threat that prompted an evacuation Sept. 12, 2019, in the first block of East Jackson Boulevard in the Loop. | Google Maps

Authorities are investigating a bomb threat that prompted an evacuation Thursday at a building in the Loop.

The threat was first reported at 2:46 p.m. at a building in the first block of East Jackson Boulevard, according to preliminary information from Chicago police.

The evacuation was ordered at 3:21 p.m., police said.

Authorities are investigating the validity of the threat.

This is a developing story. Check back for updates.