The MGM National Harbor, which opened in 2016, is a powerhouse casino near Washington, DC.

It also operates properties in China and Macau.Presentation of the MGM National Harbor Casino & Resort, Oxon Hill The company has tens of thousands of hotel rooms in Las Vegas at properties including the MGM Grand, Bellagio, Cosmopolitan, Aria, New York-New York, Park MGM, Excalibur, Luxor, Mandalay Bay and Delano. It listed telephone numbers to reach the reservation system and properties.Ī post on the company's BetMGM website in Nevada acknowledged that some customers were unable to log on. The nature of the issue was not described, but the statement said efforts to protect data included 'shutting down certain systems.' It said the investigation was continuing.Ī post on the company website said the site was down. MGM Resorts said in a statement it identified a 'cybersecurity issue affecting some of the company's systems' and that its investigation involved external cybersecurity experts. SEE ALSO | Maryland's sports betting market expands, contributing over $2.5 million to the state in August It characterized the event as 'still ongoing' and did not disclose details. The FBI is 'aware of the incident,' the bureau said in a statement from its national press office. The extent of its effect was not immediately known on reservation systems and casino floors in Las Vegas and states including Maryland, Massachusetts, Michigan, Mississippi, New Jersey, New York and Ohio, company spokesman Brian Ahern said. 7News confirmed the MGM National Harbor is also impacted by the issue.

(AP) - A 'cybersecurity issue' led to the shutdown of some casino and hotel computer systems at MGM Resorts International properties across the U.S., a company official reported Monday.

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