The company said the issue might have impacted its properties in Las Vegas, Maryland, Massachusetts, Michigan, Mississippi, New Jersey, New York and Ohio.
People view a water show at the Bellagio Hotel and Casino along the Las Vegas Strip, in Las Vegas, on July 14.MGM Resorts International reported a"cybersecurity issue" on Monday that may have impacted its hospitality, gaming and entertainment properties across the United States.
In a statement, MGM resorts said that the matter affected"some of the company's systems" and that law enforcement was notified. In July, the U.S. Securities and Exchange Commission adopted a similar rule for large, publicly traded companies. It requires a significant breach to be reported within four business days, but the requirement won't be in effect until December.