Firefighters were dispatched to the Keurig/Dr. Pepper plant in Knoxville, TN Thursday afternoon after a fire started in a coffee processing area of the facility, Rural Metro Fire Knox County announced.

“Power had been lost to the coffee grinder, but the burners continued to heat the beans causing it to over pressurize and cause a subsequent fire,” the fire department wrote in a post on its Facebook page. “Crews were able to first extinguish the fire in the roof system and then the processing area on the main floor.”

About 200 staff members safely evacuated the facility during the incident. No one was hurt.

Keurig/Dr. Pepper is investigating the cause of the blaze, Rural Metro Fire stated.