A federal investigator says there's no evidence to suggest the gas explosions that rocked communities north of Boston were intentional.
Utility Peoples Gas Light & Coke Co. placed the blame on the failure of a piece of equipment that lowers the pressure of gas from distribution lines so that it can be used in homes, the Tribune said.
As federal officials opened their investigation into Thursday's disaster, National Transportation Safety Board Chairman Robert Sumwalt said that there doesn't appear to be "anything nefarious, anything suspicious, anything intentional".
In April this year, NiSource's Columbia Gas of MA filed a petition with the state's Department of Public Utilities to increase annual revenues in order to help the company replace aging infrastructure.
Sumwalt said NTSB investigators expect to be on site up to ten days but a final report about what happened could take up to two years to complete.
In the three MA communities rocked by a series of devastating gas fires and explosions, residents are running out of patience, with their fingers pointed at Columbia Gas.
Local officials also warned about donation scammers.