Hyatt Hotels Corp said on Wednesday that its payment processing system was infected with credit-card-stealing malware in an attack discovered three weeks ago, the latest in a series of breaches at hospitality firms.<br />Company spokeswoman Stephanie Sheppard said in an email late on Wednesday that the attack was discovered on Nov. 30.<br />She did not say if the attackers succeeded in stealing payment card numbers, how long its network was infected or how many of the chain's 627 hotels were affected.<br />"Customers should review their payment-card account statements closely and report any unauthorized charges to their card issuer immediately," she said.<br />Hyatt, controlled by the billionaire Pritzker family, is the fourth major hotel operator to warn of a breach since October.
