Aflac said Friday customer health data and Social Security numbers were hacked, but that it stopped the cyber intrusion within hours and the attack did not include ransomware.

Aflac says that it has identified suspicious activity on its network in the U.S. that may impact Social Security numbers and other personal information, calling the incident part of a cybercrime campaign against the insurance industry.

Aflac has confirmed a cybersecurity breach that may have compromised sensitive customer information. The company is the latest target in a string of attacks on major insurance providers. The company said the intrusion was first detected on Thursday,