A logo is displayed on a rug outside a Marriott International Inc. hotel in Chicago, Illinois, U.S., on Friday, Nov. 30, 2018. A cyber breach in Starwood's reservation system had allowed unauthorized access to information about as many as 500 million guests since 2014. Photographer: Daniel Acker/Bloomberg
Hackers behind a massive breach at hotel group Marriott International Inc left clues suggesting they were working for a Chinese government intelligence gathering operation, according to sources familiar with the matter.
Marriott said last week that a hack that began four years ago had exposed the records of up to 500 million customers in its Starwood hotels reservation system.
