STRASBURG, Va. (AP) — Authorities in western Virginia say a gas line exploded near a highway, but no injuries have been reported. Shenandoah County Sheriff’s Office spokesperson Denise Vollmer says witnesses saw the explosion in a field off Interstate 81 on Tuesday morning and called authorities. Vollmer says the interstate was closed briefly, but the fire has been contained. She says no structures are threatened. TC Energy says it was notified of a fire after a pressure drop in its Columbia Gas Transmission Pipeline alongside the highway. The company says that section of the pipeline near Strasburg was isolated as a precaution.