MGM Resorts said they were the target of a cyber attack that affected many of their systems from Sunday to Monday and had to be shut down for security reasons.
Casino giants stated on their social media accounts that the attack affected slot machine systems as well as hotel networks, and that the website and hotel reservations were completely taken offline.
MGM said casinos remained open despite many systems being disabled and many staff working manually rather than using software technology.
Many customers posted online that they were unable to use their hotel room keys, get into their rooms, or even use their credit cards.
News of the attack caused MGM to see its price drop 2.4% on Monday.
This isn’t the first time MGM has been targeted; In 2019, the company was subject to a hacker attack that gained illegal access to the personal information of more than 10 million customers.