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Credit card data has been stolen in a hack attack on luxury hotel group Mandarin Oriental.

The company confirmed the “unauthorised cyber-attack” on credit card systems in an “isolated number” of its hotels in the US and Europe.

The breach affected credit card data and not any other personal guest information, and credit card security codes were not compromised, according to the hotel chain.

“Unfortunately incidents of this nature are increasingly becoming an industry-wide concern and therefore we have also alerted our technology peers in the hospitality industry,” Mandarin Oriental said.

“The group has identified and removed the malware and is co-ordinating with credit card agencies, law enforcement authorities and forensic specialists to ensure that all necessary steps are taken to fully protect our guests and our systems across our portfolio.

“Mandarin Oriental moved swiftly to address this issue by working with forensic experts and has removed the offending malware.

“While the group has leading data security systems in place, this malware is undetectable by all anti-viral systems.

“Guests can be confident that security protocols are being thoroughly tested at all hotels to protect guest information and prevent a recurrence of such an attack.”

The company added: “While we have executed additional security protocols, we do not wish to disclose specific details of our security measures.

“The group has put additional security measures in place at all hotels and is working to ensure everything possible is being done to protect our guests’ personal information.

“We are currently unable to confirm specific details because the forensic investigation is still underway. We will continue to provide updates as they become