High-end hotel chain Mandarin Oriental is the latest company to reveal that its credit card systems were hacked.
The company says its hotels in the U.S. and Europe were affected, but did not specify which ones.
Mandarin Oriental operates hotels in cities across the world including Paris, London, Geneva, New York, Miami, San Francisco, Las Vegas as well as Shanghai, Hong Kong and Macau.
Several companies have been the target of cyberattacks in the last year, including retailer Home Depot and bank JPMorgan Chase.
Mandarin Oriental says it has removed the bad software from its systems and its investigation is continuing. It did not give details on the extent of the hack or if customers' data was exposed.