The International Atomic Energy Agency (IAEA) has reported that the remote safeguards monitoring systems at the ruined Chornobyl nuclear power plant (NPP) had ceased transmitting data. Chornobyl, better known by its Russian name Chernobyl, was the location of the world’s worst nuclear accident, in 1986. The Chornobyl site sits in an exclusion zone and contains both decommissioned reactors and radioactive waste facilities. Since February 24, it has been occupied by invading Russian forces. The working shift of some 210 personnel who were on duty at that time have not since been relieved or rotated and have effectively been sleeping at the NPP. Ukraine’s nuclear regulator has told the IAEA that the Chornobyl staff have access to food and water and to limited medication, but that communication was solely by email. All other communications with the NPP were down.