Hyatt Hotels warns customers of malware on payment systems

Hyatt Hotels announced Wednesday it has discovered malware on computers used for payment processing at its hotels.

The company did not specify when the attack occurred, but said an investigation is ongoing.

"Hyatt has taken steps to strengthen the security of its systems, and customers can feel confident using payment cards at Hyatt hotels worldwide," it said in a statement.

Hyatt said customers should monitor account statements and report any suspicious charges.