Authorities have grown increasingly alarmed by Thursday's fire around the largest nuclear plant in Europe. The Zaporizhzhia complex was cut from electricity for hours, then reconnected to the grid on Friday. Ukrainian President Volodymyr Zelenskyy said the situation remains "risky."

The complex has been under Russian control since the early days of the invasion. Russian officials accuse Ukrainians of targeting the plant.

But analysts at the Washington-based Institute for the Study of War say it is "far more likely that Russian forces have been responsible." They say Russian troops have heavily militarized the plant despite it being far from the front lines.

Residents living nearby are preparing just in case. Some are buying face masks and tablets to protect themselves from radioactive contamination.

One female resident said, "Of course I am scared. Everyone is scared. We don't know what will happen next, what is waiting for us every next minute, second."

The head of the International Atomic Energy Agency says inspectors could visit within days. Rafael Grossi told the Le Monde newspaper that he wants to establish a permanent presence at the plant.

The mission would tackle the issue of electricity supply to maintain the reactors' cooling system and to avoid an accident like the one that struck Japan's Fukushima Daiichi plant in 2011.