Hyatt, the Chicago-based hotel chain, announced Wednesday that it had discovered a virus on computers used to process payments for some of its hotel locations.
The company cautioned that guests should review their credit-card account statements carefully and report any unauthorized charges immediately.
"As soon as Hyatt discovered the activity, the company launched an investigation and engaged leading third-party cyber security experts," Hyatt wrote in a statement.
Hyatt joins a number of other hotel businesses that have recently been compromised by hackers, including Hilton Worldwide, Mandarin Oriental, and Starwood Hotels & Resorts Worldwide. A recent study actually found that most big hotel chains have vulnerable computer systems.
If you have stayed with Hyatt, review your credit-card statement right away for any unusual activity. Most card companies won't hold you liable for fraudulent charges—and even if they do, the maximum you could get dinged is only $50, by law.
Hyatt will be posting updates regarding its investigation at hyatt.com/protectingourcustomers. Concerned customers can also call 1-877-218-3036. The chain says it "has taken steps to strengthen the security of its systems" since the hacking.