Cybersecurity issue prompts computer shutdowns at MGM Resorts properties across US

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.

The incident began Sunday. 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.

The FBI is “aware of the incident,” the bureau said in a statement from its national press office. It characterized the event as “still ongoing” and did not disclose details.

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.