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Hannaford Suit 

Philadelphia law firm, Berger &amp: Montague, filed suit Wednesday in U.S. District Court in Portland, alleging that the supermarket chain was negligent for failing to provide adequate security for computer data.

A similar lawsuit filed in U.S. District Court in Bangor named Melinda Ryan as lead plaintiff.

The data breach exposed the 4.2 million credit and debit cards to the potential for fraudulent activity. Berger &amp: Montague said the breach has exposed Hannaford customers to the risk of fraud, forcing them to spend time monitoring their accounts and dispute fraudulent charges.