NTSB steps down from Indy explosion investigation

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By Haley Coomes

Story Created: Nov 14, 2012 at 10:12 AM EDT

Story Updated: Nov 14, 2012 at 11:33 AM EDT

INDIANAPOLIS -- The feds are no longer investigating a deadly explosion in Indianapolis.

The National Transportation Safety Board stepped aside Tuesday. They were originally brought in to look into underground gas pipes, but they found no problems.

Two people died in Saturday’s explosion, including an elementary school teacher.

Officials still don't know what caused the blast.
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