Firefighters were sent to the Asphalt Express asphalt plant in Ardmore, OK last Friday after an explosion was reported at the facility. One person was killed during the incident.

Dispatched to the North Plainview Road site at about 10 a.m., fire personnel arrived at the scene and observed heavy black smoke and flames in the facility’s tank farm, the City of Ardmore Fire Department posted to its Facebook page.

“Asphalt Express personnel on scene reported all employees accounted for with the exception of one. Efforts to locate the unaccounted person were hindered by intense heat and flames,” the fire department said. “After gaining access to the area where the worker had been located, Firefighters confirmed one fatality from the initial blast. No other injuries to civilians resulted from the incident.”

In addition to the fatality, one firefighter was taken to an area hospital for heat exhaustion. Several area fire departments also responded to the facility to provide support.

Ardmore Fire told The Daily Ardmoreite than investigation into the cause of the blast is underway. “We’re not sure if the fire started at the storage tanks or at the tractor trailer at this time,” Ardmore Fire Training Officer Jason Woydziak said in an interview with the newspaper.