A top Ukrainian official on Saturday criticised the 'symbolic blow' of Russia assuming the rotating presidency of the United Nations Security Council.
"It's not just a shame. It is another symbolic blow to the rules-based system of international relations," Andriy Yermak, the Ukrainian president's chief of staff, wrote in English on Twitter.
On Saturday, Russia took over the presidency of the UN's top security body, which rotates every month. The last time Moscow held the post was in February 2022, when its troops launched a full-scale invasion of Ukraine.
The Kremlin said on Friday it planned to "exercise all its rights" in the role.
The United States on Thursday urged Russia to "conduct itself professionally" when it assumes the role, saying there were no means to block Moscow from the post.
Ukrainian official Yermak also hit out at Iran, which Kyiv and its allies accuse of supplying Russia with arms, including hundreds of assault drones which have menaced Ukrainian infrastructure facilities. Tehran denies supplying Russia with weapons.
The US and Iran failed to reach an agreement to end their war despite marathon talks that concluded on Sunday in the Pakistani capital Islamabad, jeopardising a fragile ceasefire.
Russia and Ukraine accused each other on Sunday of breaching the 32-hour ceasefire in their four-year war, reporting more than a thousand drone and shelling attacks just hours after the truce began on Saturday to mark Orthodox Easter.
At least 30 people were killed on Saturday in a stampede at the Laferriere Citadel in the northern countryside of Haiti, authorities said, warning that the death toll could rise.
A cyclone battered New Zealand's North Island on Sunday, cutting power to thousands of residents and forcing hundreds to evacuate, as officials warned conditions would worsen through the day.
Negotiations between the United States and Iran appeared to have concluded for now, Iran's government has announced early on Sunday, after a series of talks in Pakistan to end the six-week war between Washington and Tehran.