Indiana Neighborhood Explosion: Warrants Issued

Authorities confirm they are questioning one person in connection with the explosion that killed 2.
2:21 | 11/21/12

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Transcript for Indiana Neighborhood Explosion: Warrants Issued
Major new developments in the indiana home explosion that killed a young couple and damaged so many homes a few days ago. Police reportedly suspect gas was intentionally leaked in the home before a spark then caused it to explode. Alex perez is in indianapolis with the very latest in the investigation. Good morning, alex. Reporter: Good morning, elizabeth. Authorities confirm they are questioning one person and still looking for several others. The indy star is reporting that authorities believe gas may have been intentionally released into the home. And that the explosion may have been remotely detonated. Overnight, an apparent break in the investigation into who triggered the passive explosion that killed two and leveled much of this indianapolis neighborhood. Investigators are talking to individuals that we've identified as potentially having relevant information. Reporter: Police won't say who they are questioning. But brad horton and his girlfriend captured this cell phone video, as a s.W.A.T. Team descended on this mobile home park in southwestern indianapolis. These people came in tanks with people on top of them. Reporter: They say their neighbor, bob leonard, was led away for questioning. Leonard is the brother of mark leonard, whose dating shirley. Leonard and shirley live in the home that exploded. It's pretty serious. They don't usually pull those out for anything. Reporter: They ignored reporters' questions tuesday. They say they were at a casino. And the home was empty november 10th, WHEN THE EXPLOSION ROCKED Thquiet neighborhood. Killing this couple and damaging nearly 100 homes. Overnight, prosecutors refused to confirm if they believe bob leonard is involved or if they believe the blast was triggered by remote. There's interviews being conducted and search warrants being served, as identifying individuals potentially have pertinent information, we'll pursue all those leads. Reporter: Again, authorities say there have been no arrests made at this point. An attorney for the couple that lived in the home says, they are both cooperating with police. Elizabeth? All right, alex. Thanks so much. Of course, authorities saying even if they only meant to commit arson, whoever is responsible for this, they could be charged with murder because of the deaths. We're going to turn to the

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

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