Russia has taken over the largest nuclear power plant in Ukraine and Europe after fierce fighting near the facility sparked fears of a potential nuclear catastrophe.
Management of the Zaporizhzhia compound is said to be working at gunpoint after Russian military seized and occupied the site which supplies about one-fifth of Ukraine’s power.
Earlier a fire broke out in a building as Ukraine’s President Volodymr Zelenesky called on the world to “stop Russia before it becomes a nuclear disaster”, warning it could cause “six Chernobyls”.
Video verified by Reuters showed a volley of incoming shells, before a large incandescent ball lit up the sky, exploding beside a car park and sending smoke billowing across the compound.
For now the plant appears to be operating “normally” but “there is of course no normalcy about this situation when there are military forces…in charge of the site,” said International Atomic Energy Agency (IAEA) Director General Rafael Grossi.
The US said it was “deeply concerned” about Russia’s intentions while a tweet from the US Embassy in Kyiv labelled the attack a “war crime”.
Mr Zelenesky accused Russia of intentionally firing on the nuclear site and warned of potential catastrophe.
“No country besides Russia has ever fired upon an atomic power plant’s reactors. The first time, the first time in history,” Mr Volodymyr Zelensky said in a Facebook post.
Russia’s defence ministry said the plant was working normally and insisted there had been no danger nor radiation leaks . It blamed the fire on a “monstrous attack” by Ukrainian saboteurs and said its forces were in control.
US Energy Secretary Jennifer Granholm and other Western officials said there was no indication of elevated radiation levels at the plant.
The United Nations Security Council scheduled an emergency open meeting on Saturday morning (Australian time) following the attack.
United States ambassador to the UN Linda Thomas-Greenfield said the world “narrowly averted a nuclear catastrophe” and called Russia’s violent takeover “reckless” and “dangerous”.
“Russia must halt any further use of force that might put at further risk all 15 operable reactors across Ukraine – or interfere with Ukraine’s ability to maintain the safety and security of its 37 nuclear facilities and their surrounding populations.”
Thousands of people are believed to have been killed or wounded and more than one million refugees have fled Ukraine since February 24, when Russian President Vladimir Putin launched the biggest attack on a European state since World War Two.
Russian forces advancing from three directions have besieged Ukrainian cities and pounded them with artillery and air strikes.
Moscow says its aim is to disarm its neighbour and capture leaders it calls neo-Nazis. Ukraine and its Western allies call that a baseless pretext for a war to conquer the country of 44 million people.
Russia had already captured the defunct Chernobyl plant north of Kyiv, which spewed radioactive waste over much of Europe when it melted down in 1986. The Zaporizhzhia plant is a different and safer type.
Loud explosions could be heard in Kyiv on Friday morning and an air raid siren blared. Journalists in the capital were not immediately able to determine the cause of the blasts.
Only one Ukrainian city, the southern port of Kherson, has fallen to Russian forces since the invasion was launched on February 24, but Russian forces continue to surround and attack other cities.
The southeastern port city of Mariupol has been encircled by Russian forces and subjected to intense strikes, Britain said in an intelligence update on Friday.
The northeastern cities of Kharkiv and Chernihiv have been under attack since the start of the invasion, but defenders are holding out.
Kyiv, the capital of three million people, has been shelled but has so far been spared a major assault, with Russia’s main attack force stalled for days in a miles-long convoy on a highway to the north.
In Washington, a US defence official said Russians were still 25km from Kyiv city centre.
On Thursday, Russia and Ukraine negotiators agreed during peace talks on the need for humanitarian corridors to help civilians escape and to deliver medicines and food to areas of fighting.
In Russia itself, where Putin’s main opponents have largely been jailed or driven into exile over the past year, the war has been accompanied by a further crackdown on dissent.
Authorities have banned reports that refer to the “special military operation” as a “war” or “invasion”. Anti-war demonstrations have been quickly squelched with thousands of arrests.