A gas company urged the operator of a restaurant to replace a rusty pipe that is suspected to have leaked and caused a deadly explosion in a Fukushima Prefecture city last week, investigative sources said Wednesday.Police suspect a gas leak from the pipe led to the blast last Thursday at an under-renovation shabu-shabu hot pot restaurant in the city of Koriyama, leaving a construction worker dead and 19 others injured, the sources added.The gas company notified the operator of the northeastern Japan restaurant about the rusty pipe in late June when renovation work was under way, but the ope…READ FULL ARTICLE