Officials warn of donations scam in wake of gas explosions

Massachusetts gas explosions reminiscent of 1992 Chicago incident

Massachusetts gas explosions reminiscent of 1992 Chicago incident

A federal investigator says there's no evidence to suggest the gas explosions that rocked communities north of Boston were intentional.

"We have a whole system integrity system in place to monitor and measure the pressures in our lines and we do that 24/7".

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".

At least one person died and 10 more were injured in the communities of Lawrence, Andover and North Andover. Vermont Gas is not connected to the system in MA.

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.

It's still not clear what caused dozens of natural gas explosions that rocked three MA towns Thursday.

Firefighters and gas workers returned Saturday morning to a commercial area on the south side of Lawrence where they were seen opening manholes, testing gas levels and trying to gain access to businesses.