In the aim of allowing civilians to flee, even as its defenders vowed to fight to the end, Russian-announced cease-fire was due to begin Thursday at the besieged steel plant in the devastated Ukrainian city of Mariupol.
The three-day halt in Russia’s attack on the Azovstal steelworks was announced as EU member states debated a proposed ban on Russian oil, the bloc’s toughest move yet over Moscow’s invasion of its neighbor.
The EU also pledged to “significantly increase” support for Ukrainian neighbor Moldova, where a series of attacks in a Russia-backed separatist region has sparked fears a war that has killed thousands could spread more than two months after it began.
European Commission chief Ursula von der Leyen on Wednesday said the bloc would “phase out Russian supply of crude oil within six months and refined products by the end of the year,” a move that would still not touch its huge gas exports.
But within hours, Hungary — whose populist leader Viktor Orban is one of Russian President Vladimir Putin’s few EU partners — said it could not support the plan “in this form,” as it would “completely destroy” the security of its energy supply.
Ukrainian Foreign Minister Dmytro Kuleba hit back that EU countries blocking an oil embargo would be “complicit” in Russia’s crimes in Ukraine.
Ukraine’s allies have sent money and, increasingly, heavy weapons to Kyiv to help it defend itself in a war US President Joe Biden has framed as a historic battle for democracy.
Biden said Wednesday he was “open” to imposing more sanctions on Russia and would be discussing measures with allies from the Group of Seven democracies in the coming days.
But despite severe blows to its economy and the thwarting of its early war goals, Russia continues to steadily pound away at Ukraine’s embattled eastern defenses.
After failing to capture Kyiv, Russia’s military campaign is now focused on uniting separatist pro-Russian areas in the east with Crimea, which Moscow seized in 2014.
The strategic southern port of Mariupol has become an emblem of the suffering of the war, with an untold number of dead and basic supplies cut off as Moscow carried out a scorched-earth campaign to wrest control.
The last Ukrainian soldiers are holding out at the Azovstal steelworks, where Mariupol Mayor Vadym Boichenko said there was heavy fighting Wednesday.
Russia was attacking with heavy artillery, tanks, planes and ships off the coast, he told Ukrainian television.
“There are local residents there, civilians — hundreds of them there,” he added. “There are children waiting for rescue. There are more than 30 kids.”
Russia’s defense ministry announced a daytime cease-fire for three days beginning Thursday to evacuate civilians from the plant.
“The Russian armed forces will open a humanitarian corridor from 08:00 to 18:00 Moscow time (0500 to 1500 GMT) on May 5, 6 and 7 from the site of the Azovstal metallurgical plant to evacuate civilians,” the ministry said.
In Washington, State Department spokesman Ned Price voiced skepticism about the cease-fire, saying Moscow had repeatedly resumed shelling after announcing pauses.
Denys Prokopenko, commander of the nationalist Azov regiment, meanwhile, vowed to never surrender the plant.
“The situation is extremely hard. However, we will continue carrying out the order to keep up our defenses no matter what,” he said in a video.

The second stage of Mariupol evacuation operations had brought 344 newly freed people to Ukrainian-controlled Zaporizhzhia, President Volodymyr Zelensky said Wednesday.
“They will all receive the necessary help, they will all receive the most attentive care from the government,” Zelensky said in a video address, adding the looming Azovstal cease-fire was desperately needed to free trapped civilians.
“It takes time to just lift people out of those basements, out of those underground shelters,” he said.
“In the current conditions, we cannot use special equipment to clear the debris. Everything is done manually.”
Ukraine’s military intelligence has accused Russia of planning to hold a parade in Mariupol on May 9 to celebrate victory over the Nazis in World War II.