Officials are investigating an overnight fire at a Vonore metal factory.

Fire crews responded to a fire at the Protech Metal Finishing facility late Saturday night. No official cause of the fire has been released, but crews said it could be a Hazmat situation because of chemicals inside the building.

Tennessee Emergency Management Agency officials were on site to help with the cleanup.

People who lived nearby watched as the fire grew. Mary Stamey and Alexis Whitford, two servers at Lakehouse Grill, said they were scared it would spread to nearby neighborhoods. 

"As it started getting darker, the flames were very bright. It was just scary, we were hoping everyone was alright," Whitford said. 

This is the second fire at the Protech Metal facility. The building also suffered a small fire back in 2013.