A major ransomware attack has brought businesses to a close throughout Europe, in an infection reminiscent of last month’s WannaCry attack. The most severe damage is being reported by Ukrainian businesses, with systems compromised at Ukraine’s central bank, state telecom, municipal metro, and Kiev’s Boryspil Airport. Systems were also compromised at Ukraine’s Ukrenego electricity supplier, although a spokesperson said the power supply was unaffected by the attack.

The attack has even affected operations at the Chernobyl nuclear power plant, which has switched to manual radiation monitoring as a result of the attack. Infections have also been reported in more isolated devices like point-of-sale terminals and ATMs.

The virus has also spread internationally. The Danish shipping company Maersk has also reported systems down across multiple sites, including the company’s Russian logistics arm Damco. The virus also reached servers for the Russian oil company Rosneft, although it’s unclear how much damage was incurred. There have also been several recorded cases in the United States, including the pharmaceutical company Merck, a Pittsburgh-area hospital, and the US offices of law firm DLA Piper.