jon: a fox news alert for you now, we are learning that explosion at a commercial building in south los angeles has turned deadly. new video is just coming in. the force of that ebgts khraougs explosion sending people flying into the street, wedging epl under parked cars. the captain of the l.a. fire department joins us now on the phone. we understand this was a natural gas explosion, captain? we are not absolutely sure. this particular structure is on a commercial street where welding operations took place. it was a building 100x100. i m one hundred feet from it gathered with search and rescue dreams watching them make searching. they are doing quick shoring so the structure will not collapse on them as they are looking for a third sreup. there could be inside this