Aflac, one of the largest insurance companies in the United States, says hackers stole an unknown quantity of its customers’ personal information from its network during a cyberattack earlier this month.

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.

Health and life insurer Aflac on Friday said it is investigating a breach on its U.S. network that may have exposed customers' personal information, making it the latest insurance provider to be targeted in a cyberattack.