INDIANAPOLIS - The National Transportation Safety Board has pulled out of the investigation into an explosion in a south side Indianapolis neighborhood.
NTSB officials told RTV6 on Tuesday that inspectors found no trouble with underground gas pipes, which fall under the organization's jurisdiction, in the Richmond Hill subdivision, near Sherman Drive between County Line Road and Stop 11 Road.
Special Section: Indy Explosion
Two people were killed and dozens of homes sustained serious damage in the Saturday night blast that displaced 200 people.
Citizens Energy officials said inspectors have found no problems with gas lines in the neighborhood or the gas lines running to individual houses.
Authorities have not said what they believed caused the explosion, although officials said they have ruled out a bomb, a methamphetamine lab and an airplane crash.
The Bureau of Alcohol, Tobacco, Firearms and Explosives is assisting in the investigation.