A critical nuclear power plant in Ukraine again lost external power, international energy officials said on Saturday, heightening concerns as the energy battle between Moscow and the West ramped up in recent days amid the ongoing war.

Ukraine's Zaporizhzhia plant -- the largest in Europe -- saw its last remaining main external power line cut off even as a reserve line continued supplying electricity to the grid, the International Atomic Energy Agency (IAEA) said.

Only one of the six reactors remained in operation at the station, the agency said in a statement posted on its website. The plant, controlled by Moscow since Russian troops invaded Ukraine in late February, has become a focal point of the conflict, with each side blaming the other for nearby shelling.

Meanwhile, the standoff over Russian gas and oil exports ramped up this week as Moscow vowed to keep its main gas pipeline to Germany shuttered, and G7 countries announced a planned price cap on Russian oil exports.
 

The energy fight is fallout from President Vladimir Putin's six-month invasion of Ukraine, underscoring the deep rift between Moscow and Western nations as Europe steels itself for the cold months ahead.

"Russia (is) preparing a decisive energy blow on all Europeans for this winter," Ukrainian President Volodymyr Zelenskiy said in his nightly address on Saturday, citing the Nord Stream 1 pipeline's continued closure.
 

Zelensky blamed Russian shelling for the nuclear plant's cutoff last week that narrowly avoiding a radiation leak. Moscow has cited Western sanctions and technical issues for energy disruptions, while European countries have accused Russia of weaponizing supplies as part of its military invasion.

NUCLEAR CONCERNS
 

Kyiv and Moscow have traded accusations about attacks on the Zaporizhzhia plant, captured by Russian forces in March but still operated by Ukrainian staff and connected to the Ukrainian power grid.

An IAEA mission toured the plant on Thursday, and some experts have remained there pending the release of a report by the U.N. nuclear watchdog in the coming days.
 

Last week, Zaporizhzhia was severed from the national grid for the first time after transmission lines were cut, prompting power cuts across Ukraine. However, emergency generators kicked in for vital cooling processes.

Meanwhile, the IAEA on Saturday said that the remaining inspectors noted that one reactor was "still operating and producing electricity both for cooling and other essential safety functions at the site and for households, factories and others through the grid."

In a statement, the Zaporizhzhia nuclear power station said the fifth reactor was switched off "as a result of constant shelling by Russian occupation forces" and that there was "insufficient capacity from the last reserve line to operate two reactors."

Deteriorating conditions amid the shelling have prompted fears of a radiation disaster that the International Red Cross has said would cause a major humanitarian crisis. Ukraine and the West accuse Russia of storing heavy weapons at the site to discourage Ukraine from firing on it.
 

Russia, which denies the presence of any such weapons there, has so far resisted international calls to relocate troops and demilitarise the area.

Russia's defence ministry on Saturday accused Ukrainian forces of mounting a failed attempt to capture the plant, but Reuters could not verify the report. Turkey on Saturday also offered to facilitate the situation.

GAS AND OIL
 

In its announcement on Friday that it would not resume shipments through the Nord Stream 1 pipeline as had been expected, Russia's state-controlled energy giant Gazprom (MCX:GAZP) blamed a technical fault.

Gazprom said on Saturday that Siemens Energy was ready to help repair broken equipment but that there was nowhere available to carry out the work. Siemens said it has not been commissioned to carry out maintenance work for the pipeline, but it is available.
 

Nord Stream 1, which runs under the Baltic Sea to supply Germany and others, had been due to resume operating after a three-day halt for maintenance on Saturday at 0100 GMT.

The indefinite delay to resuming gas deliveries will deepen Europe's problems securing fuel for winter with living costs already surging, led by energy prices.
 

Finance ministers from the Group of Seven wealthy democracies - Britain, Canada, France, Germany, Italy, Japan and the United States - on Friday said a cap on the price of Russian oil aimed to "reduce ... Russia’s ability to fund its war of aggression whilst limiting the impact of Russia’s war on global energy prices".

The Kremlin said it would stop selling oil to any countries that implemented the cap. On Saturday, the Ukrainian armed forces' general staff said its forces had repelled Moscow's advancements in variought to push through the Donetsk region.
 

Fighting also continued in the Kharkiv region and the south, Zelenskiy said on Saturday. Russia invaded Ukraine on Feb. 24 in what it calls "a special military operation." Kyiv and the West have said it was an unprovoked aggressive war against a former part of the Soviet Union.

More than six months later, Russia has pressed ahead as the United States and other countries have pledged fresh military aid for Kyiv.

Ukraine had launched a counter-offensive earlier this week after several weeks of relative stalemate in the conflict that has seen thousands killed and millions displaced. It targets the south, particularly the Kherson region, occupied by Russians early in the conflict. - investing

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