KINGFISHER, Okla. (AP) — Central Oklahoma authorities say three people have been injured in an explosion and fire at a saltwater disposal well.

Kingfisher County emergency management officials say the explosion occurred shortly after 3 p.m. Wednesday at a saltwater disposal well south of Oklahoma Highway 33. The wells are used to dispose of wastewater from oil and natural gas operations.

Officials say those injured have been taken to a local hospital for treatment, but their conditions were not immediately available.

Authorities say the fire at the disposal well has been extinguished and that...