Numerous fire trucks, police and emergency responders were at McDonald's in Fredonia late Sunday.

Three employees were injured after a fire and explosion at a Fredonia restaurant Sunday night.

Chautauqua County Sheriff’s deputies report at 10:20 p.m., multiple phone calls came in to the Dispatch Center reporting an explosion with injuries at the McDonald’s located at 500 E. Main St. The Fredonia Fire Department and Fredonia Police Department responded with assistance from the Dunkirk Police Department, New York State Police, Alstar Ambulance, and the Chautauqua County Office of Emergency Services. A female employee was flown to a hospital in Buffalo for treatment, another female employee was transported to a local hospital for treatment, and a male employee was evaluated at the scene.

The Chautauqua County Fire Investigation Team was requested to assist in an origin and cause investigation of this incident. Though the investigation, it was determined that an employee had pulled out a grilling unit in order to clean behind it. In pulling out the unit, the natural gas line that supplied the grilling unit became detached, allowing natural gas to flow freely and was ignited by another grilling unit causing the explosion.

Safety features that were in place automatically shut off the natural gas supply and extinguished the fire keeping damages to a minimum. The McDonald’s remains closed and the fire is being ruled accidental in nature.