DILLINER, Pa. (AP) - One worker has been injured and another is missing after a natural gas well explosion and fire in southwestern Pennsylvania, near the West Virginia border.

Chevron spokesman Trip Oliver says the fire was reported at about 6:45 a.m. at the Lanco 7H well in Dunkard Township, near Bobtown. That's about 50 miles south of Pittsburgh. Oliver says one person is reported hospitalized and another is currently unaccounted for.

Oliver says Chevron personnel immediately responded to the fire and called in assistance from Wild Well Control.

Department of Environmental Protection spokesman John Poister says this is the first serious Marcellus Shale well blowout in western Pennsylvania. Poister says no schools, homes or businesses are within a state police half-mile perimeter, and the fire appears to be contained to the well pad.

(Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)