An undisclosed brand of the Carnival Corporation & plc group has become a target of a ransonware attack, the company said in a statement.

The attack was detected on 15 August and it that accessed and encrypted a portion of one brand’s information technology systems. “The unauthorized access also included the download of certain of our data files,” Carnival said.

“Promptly upon its detection of the security event, the Company launched an investigation and notified law enforcement, and engaged legal counsel and other incident response professionals. While the investigation of the incident is ongoing, the Company has implemented a series of containment and remediation measures to address this situation and reinforce the security of its information technology systems,” the company said.

Carnival is working with industry-leading cyber security firms to immediately respond to the threat, defend its information technology systems, and conduct remediation.

“Based on its preliminary assessment and on the information currently known (in particular, that the incident occurred in a portion of a brand’s information technology systems), the Company does not believe the incident will have a material impact on its business, operations or financial results. Nonetheless, we expect that the security event included unauthorized access to personal data of guests and employees, which may result in potential claims from guests, employees, shareholders, or regulatory agencies,” Carnival said.