ABU DHABI: Negotiators from Ukraine, Russia and the United States were set to gather in Abu Dhabi on Wednesday, seeking to advance fraught talks on how to end the four-year war.

Several rounds of diplomacy between the sides have failed to strike a deal on ending Europe’s deadliest conflict since World War II, which began when Russia invaded in February 2022.

A massive Russian drone and missile barrage in the run-up to the talks, pounding Ukraine’s energy grid and knocking out power and heating in temperatures far below freezing, threatened to overshadow any chances of progress in the Emirati capital.

“Each such Russian strike confirms that attitudes in Moscow have not changed: they continue to bet on war and the destruction of Ukraine, and they do not take diplomacy seriously,” Ukrainian President Volodymyr Zelensky said on Tuesday.

“The work of our negotiating team will be adjusted accordingly,” he said, without elaborating.