>> 8,000 residents from several Boston towns are being prevented from returning home, Friday as investigators scramble to find out the cause of dozens of gas explosions that rocked the sub urban areas on Thursday. Massachusetts Governor, Charlie Baker.>> We've made a decision to declare a state of emergency.
>> The probe is focusing on a gas pipeline belonging to Columbia Gas of Massachusetts says, National Transportation Safety Board Chairman Robert Sumwalt.>> Certainly things we will be looking at will be the design of the pipeline system, any maintenance or upgrades that may been done or in the process of being done on the pipeline.
The integrity management system of the pipeline operator. Our mission is to find out what happened, so that we can learn from it and keep it from happening again.>> Damage from the blast was widespread. Homes and other buildings in Andover, North Andover and Lawrence, Massachusetts were leveled by the series of blasts.
Structures not destroyed were left without power impacting more than 18,000 homes and businesses. Router's Reporter Nate Raymond.>> There are definitely houses that you can by and they're just demolished. A lot of people are in shelters. The people I talked expressed some anxiousness to get home and return some normal normal seats to their lives.
>> The explosions resulted in one death and at least a dozen injured. One fire chief described the whole thing as the worst disaster he's ever experienced. Since gas leaks can be odorless and colorless, officials aren't ready to let people back into their homes. Fearing more lives and properties are at risk.
NiSource, parent company of Columbia of Gas is investigating the cause of the blasts. Shares of the publicly traded company fell 12% on the New York Stock Exchange.