Deadly Explosion in Illinois, Kills 1, Injures 11

Downtown business district shattered when utility workers were repairing a natural gas leak.
1:37 | 11/18/16

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Transcript for Deadly Explosion in Illinois, Kills 1, Injures 11
deadly explosions, one ripping through a downtown business district while utility workers were repairing a natural gas leak. The other, shattering a home, killing one person inside. The cause still under investigation. And tonight, with cold air moving in, and many turning on the heat, officials are reminding us of a simple $30 fix. ABC's gio Benitez is in Illinois tonight. Reporter: Surveillance cameras capturing the moment of the blast blowing this store's front door open. Shattering glass and sending debris flying. There used to be a building right there, guys. Reporter: Firefighters race to the scene while rescuers search overnight for survivors. Tonight, authorities including the NTSB investigating the cause of that gas explosion. So, you were having dinner? Yes. Reporter: And you hear what? The loudest kaboom ever I heard in my life. Almost thought lightning had hit. Reporter: It happened Wednesday night as utility crews worked to repair a natural gas leak apparently caused by digging. One worker was killed, 12 others injured. The power company, Ameren Illinois, saying the gas was turned off at the time of the blast. This, the second deadly explosion in just the last 24 hours. A similar one splintering a home in Spencer, Indiana, yesterday. The government now working to prevent future blasts. Starting in January, it will require a $30 safety valve on new and replaced gas lines that will shut off gas automatically when a line is ruptured. And David, we now know the utility worker who was killed with a 38-year-old man. Two of his colleagues are still in the hospital right now. This, as people here try to pick up the pieces, at least, whatever's left. David? Gio Benitez with us tonight. Thank you.

This transcript has been automatically generated and may not be 100% accurate.

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