Russian forces have been shelling Europe's largest nuclear power plant in Ukraine - causing a fire in one of its unused reactors.
Emergency services say the flames have now been put out, and radiation levels are currently normal.
But officials at Zaporizhzhia are warning that, if the plant blows up, it could be ten times worse than Chernobyl.
Both the US President and the British Prime Minster have spoken by telephone with the Ukrainian President Volodymyr Zelenskyy overnight, to get updates on the blaze.
There are calls for an emergency UN meeting to discuss the fire .
President Volodymyr Zelenskyy had this warning if nothing's done to help.
"If there is an explosion, that's the end for everyone, the end for Europe, the evacuation of Europe. Only urgent action from Europe can stop the Russian troops.
"Do not allow the death of Europe from a catastrophe at a nuclear power station."
