Ukraine is ready to proceed with a ceasefire prohibiting attacks on energy infrastructure, President Volodymyr Zelensky said, in line with a deal that was brokered by the United States during three days of negotiations with Ukrainian and Russian officials in the Saudi capital.

Speaking in a video address late on Tuesday, Mr Zelensky said Ukraine had agreed with US negotiators “that a ceasefire for energy infrastructure can start today”.

But, he warned, any strikes on Ukraine’s energy facilities by Moscow would draw “strong retaliation”.

The comments underscored the tenuous agreements that came out of the three days of separate US-Ukrainian and US-Russian talks in Riyadh.

Washington said it had agreed with the warring parties to implement a pause on attacks on energy infrastructure as well as taking steps to ensure safe navigation for ships in the Black Sea.

Those talks were part of a broader effort toward a limited, 30-day ceasefire that Moscow and Kyiv agreed to in principle last week but has thus far failed to materialise as both sides continue to launch drone and rocket attacks against the other.

Russian invasion of Ukraine
Ukrainian President Volodymyr Zelensky (Peter Nicholls/PA)

While Mr Zelensky on Tuesday thanked the U.S. for its efforts to strike an agreement, questions remained over some key details, and a comprehensive peace deal to end the three-year war still looked distant.

On Tuesday, the White House said in separate statements that the sides had “agreed to ensure safe navigation, eliminate the use of force, and prevent the use of commercial vessels for military purposes in the Black Sea”.

Details of the prospective deal were not released, but it appeared to mark another attempt to ensure safe Black Sea shipping after a 2022 agreement that was brokered by the UN and Turkey but halted by Russia the next year.

After the White House issued its statement Tuesday, the Kremlin warned that a potential Black Sea deal could only be implemented after sanctions against the Russian Agricultural Bank and other financial organisations involved in food and fertiliser trade are lifted and their access to the SWIFT system of international payments is ensured.

Mr Zelensky on Tuesday evening reacted to those demands, casting them as an example of Moscow “manipulating, twisting agreements, and lying” about the terms of the agreement.

“There are absolutely clear statements that have been published by the White House, everyone can see what is stated there,” Mr Zelensky said.

“And there is something that the Kremlin is lying about again: that supposedly the (ceasefire) in the Black Sea depends on the issue of sanctions.”

Russia Ukraine War
Firefighters put out the fire following a Russian attack in Donetsk region, Ukraine (Ukrainian Emergency Services/PA)

In an apparent reference to Moscow’s demands, the White House said the US “will help restore Russia’s access to the world market for agricultural and fertiliser exports, lower maritime insurance costs, and enhance access to ports and payment systems for such transactions”.

Meanwhile, Kryvyi Rih, Mr Zelensky’s hometown, came under the “most massive kamikaze drone attack since the beginning of the war” on Tuesday night, the city administration head, Oleksandr Vilkul, wrote on Telegram.

“Everyone is alive, thank God. It’s truly a miracle. The destruction is significant,” Mr Vilkul said.

Civilian infrastructure also came under strike in the Sumy, Cherkasy, and Kirovohrad regions, local authorities said.

There were no immediate reports on any injuries.

Overall, Russian forces launched 117 Shahed and decoy drones overnight, Ukraine’s air force said on Wednesday morning, adding that 56 drones were destroyed and 48 more jammed by the defence forces.