Mar 31, 2008 12:00 PM, By MARK HAMSTRA

By: By MARK HAMSTRA

PORTLAND, Maine — At least six class-action lawsuits have been filed in Federal District Court here against Hannaford Bros. and its parent company, Delhaize Group, following the chain's disclosure that up to 4.2 million credit and debit card numbers might have been put at risk by a security breach.

The chain said 1,800 cases of fraud were reported in connection with the incident, which also impacted customers of Hannaford's sister chain in Florida, Sweetbay, and some independent stores that Hannaford supplies.

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