EVANSTON, Wyo. (AP) — A natural gas storage site in southwestern Wyoming has exploded in flames, but no one is hurt.

Officials say firefighters are staged early Sunday about a mile away and monitoring the situation. They're waiting for daylight to tackle the flames.

Crews responded late Saturday afternoon to a report of an explosion at the facility, 15 miles north of Evanston in Uinta County.
Fire official Eric Quinney says they suspect a faulty pressure valve caused the problem.

Since no people or buildings are threatened, Quinney says firefighters are waiting until they can see better.

The facility includes a main structure and some pipelines. Companies store natural gas underground there.