Videos on social media showed video slot machines that had gone dark. MGM Resorts said the incident began Sunday, affecting reservations and casino floors in Las Vegas and other states. 'It's been kind of an issue for me,' she said, 'but I'm now monitoring my credit, and now I'm taking these extra steps.' Unsettled by the thought of what other information the hackers may have stolen, Martinez, a publicist from Los Angeles, said she signed up for a credit report monitoring program, which will cost her $20 monthly. Now she was being greeted by four new transactions she did not recognize-charges that she said increased with each transaction, from $9.99 to $46. Martinez, 45, immediately checked her bank statements for the credit card linked to her loyalty account. There, she learned that the largest casino owner in Las Vegas had fallen victim to a cybersecurity breach.

That's odd, she thought, then toggled over to Facebook to search for clues about the issue on a group for MGM Resorts International loyalty members.

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