Russian attacks were reported across large areas of Ukraine on Thursday, with heavy shelling in numerous regions damaging infrastructure, including power supplies to Europe's largest nuclear power plant, Ukrainian officials said.

The Zaporizhzhia nuclear power plant in southern Ukraine has again been disconnected from the power grid after Russian shelling damaged the remaining high voltage lines, leaving it with just diesel generators, Ukraine nuclear firm Energoatom said.

The plant, in Russian hands but operated by Ukrainian workers, has 15 days' worth of fuel to run the generators, Energoatom said.

Russian strikes were also reported in Kriviy Rih, in central Ukraine, and in Sumy and Kharkiv, in the northeast. Heavy fighting was ongoing in the eastern regions of Luhansk and Donetsk.

"The enemy is trying to keep the temporarily captured territories, concentrating its efforts on restraining the actions of the Defense Forces in certain areas," Ukraine's general staff said on Thursday.

Russia has said it targeted infrastructure as part of what it calls its "special military operation" to degrade the Ukrainian military and remove what it says is a potential threat against Russia's security.

As a result, Ukrainian civilians have endured power cuts and reduced water supplies in recent weeks. Russia denies targeting civilians, though the conflict has killed thousands, displaced millions and left some Ukrainian cities in ruins.

Grain deal resumes

The attacks come after Russia said it would resume its participation in a deal freeing up grain exports from Ukraine, reversing a decision that world leaders warned would increase hunger globally.

Russia, whose forces invaded Ukraine on Feb. 24, announced the reversal on Wednesday after Turkey and the United Nations helped keep Ukrainian grain flowing for several days without a Russian role in inspections.

The Valerio dry bulk cargo vessel, carrying Ukrainian wheat bound for Spain, on the Bosporus in Istanbul, on Wednesday. Wheat prices plunged after Russia agreed to resume the deal allowing safe passage of Ukrainian crop exports. | Bloomberg
The Valerio dry bulk cargo vessel, carrying Ukrainian wheat bound for Spain, on the Bosporus in Istanbul, on Wednesday. Wheat prices plunged after Russia agreed to resume the deal allowing safe passage of Ukrainian crop exports. | Bloomberg

The defense ministry justified the resumption by saying it had received guarantees from Ukraine that it would not use the Black Sea grain corridor for military operations against Russia.

"The Russian Federation considers that the guarantees received at the moment appear sufficient, and resumes the implementation of the agreement," the ministry said in a statement.

Ukrainian President Volodymyr Zelenskyy said it was important to stand up to "crazy Russian aggression that destabilizes international trade."

"After eight months of Russia's so-called special operation, the Kremlin is demanding security guarantees from Ukraine," Zelenskyy said in his nightly video address.

"This is truly a remarkable statement. It shows just what a failure the Russian aggression has been and just how strong we all are when we maintain our unity."

The grain deal, originally reached three months ago, had helped alleviate a global food crisis by lifting a de facto Russian blockade on Ukraine, one of the world's biggest grain suppliers. The prospect of it collapsing this week revived fears of a worsening food crisis and rising prices.

The prices of wheat, soybeans, corn and rapeseed fell sharply on global markets after Russia's announcement.

Zelenskyy credited Turkey and the United Nations for making it possible for ships to continue moving out of Ukrainian ports with cargoes after Russia suspended participation on Saturday.

Russia suspended its involvement in the deal saying it could not guarantee safety for civilian ships crossing the Black Sea after an attack on its fleet. Ukraine and Western countries called that a false pretext for "blackmail," using threats to the global food supply.

Kherson counteroffensive

Eight months into the war, Ukrainian forces have wrested back territory in the east and south, and Moscow has sought to slow their momentum with stepped up missile and drone strikes targeting the energy grid.

On Wednesday, authorities in the capital Kyiv region began emergency shutdowns of the power-generating system after a spike in consumption, the regional administration said.

Civilians evacuated from the Russian-controlled Kherson region of Ukraine get off a bus as they arrive at a local railway station, after Russian-installed officials extended an evacuation order to the area along the eastern bank of the Dnipro River, in the town of Dzhankoi, Crimea, on Wednesday.  | REUTERS
Civilians evacuated from the Russian-controlled Kherson region of Ukraine get off a bus as they arrive at a local railway station, after Russian-installed officials extended an evacuation order to the area along the eastern bank of the Dnipro River, in the town of Dzhankoi, Crimea, on Wednesday. | REUTERS

The move was necessary to "avoid major accidents with power equipment," a statement said, after Russian attacks badly damaged the grid in and around the capital.

Russia has said it targeted infrastructure as part of what it calls its "special military operation" to degrade the Ukrainian military and remove what it says is a potential threat against its own security.

As a result, Ukrainian civilians have endured power cuts and reduced water supplies across the country in recent weeks. Moscow denies deliberately targeting civilians, though the conflict has killed thousands, displaced millions and left some Ukrainian cities in ruins.

In southern Kherson region, where Ukrainian forces are proceeding slowly with a counter-offensive against Russian occupying forces, Russian-installed authorities proceeded with a drive to persuade residents to evacuate, a Wednesday night statement on Facebook by the Ukrainian military said.

Residents who had collaborated with occupying forces were leaving and some departing medical staff had taken equipment from hospitals, the statement said.

Residents of the town of Nova Zburivka in Kherson region had been given three days to leave and told that evacuation would be obligatory from Nov. 5.

Reuters was not able to verify the battlefield reports.

Meanwhile, in Washington on Wednesday the United States said it had information that indicated North Korea is covertly supplying Russia with a "significant" number of artillery shells for its war in Ukraine.

White House national security spokesperson John Kirby did not provide evidence but he told a virtual briefing that North Korea was attempting to obscure the shipments by funneling them through countries in the Middle East and North Africa.