Reuters: An explosion over the weekend at a natural gas well site in West Virginia operated by Antero Resources injured at least five people, prompting state and federal investigations, local officials and Antero said on Monday.
A spark triggered a flash explosion and a fire after a problem during the "flow back" process when drilling fluids are pumped into storage tanks, according to Pat Heaster, director of emergency services in Doddridge County, about 100 miles north of Charleston.
The "flow back"...