Marriott International Inc said on Tuesday the UK Information Commissioner's Office (ICO) had proposed to fine the hotel chain $124 million due to a massive data breach in its Starwood hotels reservation system.

UK watchdog proposes to fine Marriott $124 million over data breach

Marriott International said on Friday that hackers accessed up to 500 million customer records in its Starwood Hotels reservation system in an attack that began four years ago, exposing data including passport numbers and payment cards.

Marriott's Starwood hack hits up to 500 million customers

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.

Clues in Marriott hack implicate China: Report

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UK watchdog proposes to fine Marriott $124 million over data breach

Marriott's Starwood hack hits up to 500 million customers

Clues in Marriott hack implicate China: Report