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PITTSBURG COUNTY, Okla. – Officials say a Union Pacific train derailed in Pittsburg County on Sunday.

Law enforcement and emergency crews responded to the area about two miles north of Kiowa, Oklahoma.

Officials with Union Pacific say just after 6:30 a.m., 16 rail cars and a rear-facing locomotive on a northbound train derailed.

Of the derailed cars, nine were empty. A spokesperson says she cannot say for certain what was in the remaining seven cars, though the train itself was carrying steel, grain and beer.

Pittsburg County Emergency Management officials tell News 4 there were no chemical spills or injuries.

They say a large amount of cleanup is underway.

The cause of the derailment is still under investigation.