Cyber criminals may have accessed claims information, health information, social security numbers, and/or other personal information.

Aflac, which provides supplemental insurance to around 50 million individuals whose expenses are not covered by their primary providers, said it was not yet known how many customers are affected by the data breach but that the personal data includes customers' claims,

Insurance company Aflac disclosed this week that cybercriminals breached its U.S. network and may have accessed customers’ personal information, the latest in a string of cyberattacks on insurance companies announced this month.