MGM Resorts' hotels and casinos are back up and running normally following last week's cyber incident, the company said Wednesday in a post on X, the social media site formerly known as Twitter. 

MGM Resorts said its employees would be able to help guests deal with intermittent issues. 

In a prior post Wednesday, MGM Resorts said customers would be able book spa and dining through the company website as well as explore entertainment options. However, the company said it was still working to restore hotel booking and MGM Rewards functionality on the site. 

MGM Resorts has more than 30 hotels and casinos worldwide, including some of the biggest names in Las Vegas, including the MGM Grand, Bellagio and Mandalay Bay. 

Hotel operations have been disrupted for more than 10 days following an cyberattack which involved criminal hackers gaining access to the hotel’s computer systems through social engineering. 

Katell Thielemann, distinguished VP analyst at Gartner, said the scale of the attack reflects the vulnerability of even the most cyber aware companies falling prey to sophisticated threat groups. 

Casinos are highly dependent on interconnected technology and have sophisticated systems designed to prevent fraud and other malicious criminal behavior. 

“In the MGM case, the particularly shocking part is the range of systems that were impacted, from IT systems to casino cyber-physical systems such as elevators, room card readers, ATMs and building management systems,” Thielemann said via email.

FBI officials reiterated that the agency was investigating the incident, but could provide any additional details due to the ongoing investigation. 

Officials at the Nevada Gaming Control Board, which passed regulations in December requiring gaming companies to disclose cyber governance and mitigation strategies, declined to comment