A spokeswoman for Hyatt Hotels Corp. said Wednesday it discovered malicious software on its computers system three weeks ago but did not say if hackers got their hands on credit card numbers or other information.
Hyatt advised customers to review credit card statements without saying credit cards were compromised in the breach that was discovered Nov. 30.
In the past year, hackers have also hit the "Hilton, Starwood, Mandarin Oriental and Trump Collection chains," according to a report.
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