A fire broke out Saturday afternoon at a Quaker Oats plant in Cedar Rapids, Iowa, sending a large plume of black smoke over the downtown area.

According to the Associated Press , the Cedar Rapids Fire Department received the call at approximately 4:45 p.m. Saturday. Photos and videos shared on social media showed smoke rising over the city as emergency crews responded to the facility.

There were no immediate reports of injuries, and officials had not yet determined what caused the fire, according to AP.

Local officials later said firefighters responding to the facility found what appeared to be evidence of an explosion followed by a fire.…