(Bloomberg) — Hackers may have breached a database withinformation on 1.1 million customers of CareFirst BlueCrossBlueShield, a health insurer operating in Maryland, Virginia andthe District of Columbia.

The breach happened last June, when hackers targeted a databasethat contained information customers used to log on to CareFirst'swebsite, the not-for-profit health insurer said in a statementWednesday.

They may have obtained names, birth dates, e-mail addresses andsubscriber identification numbers, the insurer said. The databasedidn't have passwords, Social Security numbers, credit cardinformation or medical records.

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