PRINCETON, Ind. – Some workers were evacuated from the Toyota factory in southwestern Indiana after a fire broke out in an air-handling unit.

Officials at the factory near Princeton said the evacuation happened Tuesday morning after smoke was noticed in a body weld shop. Crews found the fire inside a heating, ventilation and air conditioning unit and workers were allowed back inside the factory after about 20 minutes.

WFIE-TV reported that a couple hundred people were evacuated from the factory 20 miles north of Evansville that has about 4,100 total workers.