WALTHAM, Mass. — National Grid is under fire again from Massachusetts customers over billing problems. Numerous gas and electric customers said the utility giant left them in the dark for months ...

BOSTON — National Grid -- the state's largest gas utility -- is being hit with millions of dollars in penalties from Massachusetts for "systemic" and "inexcusable" customer service failures.

National Grid says it will cooperate with the order and won't collect more than 60 days of outstanding bill charges. Customers who paid bills that were more than 60 days old will receive a credit ...