Chris Conneally | KERA News

Chris Conneally

State Farm / Flickr.com

4:46: Chris Connealy , Texas State Fire Marshal, says after one of the most intense explosion investigations ever undertaken by the ATF, the cause of the fire and explosion in West on April 17,  is officially undetermined, and the investigation continues. 

Officials are still looking at possible causes that could have started the fire and  the explosion, including the 120 volt plant, a nearby golf cart, and the possibility the blast might have been caused intentionally. The investigation is being treated as a criminal investigation, and again, it is ongoing.