The leaders of Russia, Germany and France agreed during late-night talks in Moscow to draw up a plan to end fighting in Ukraine as rebels wage a deadly offensive in the country's east, officials said Saturday.
A spokesman for Russian President Vladimir Putin said that more than four hours of talks that wrapped up early Saturday saw the leaders agree on the drafting of a blueprint that would also include proposals from Ukraine's Petro Poroshenko.
"They were substantial and constructive," Kremlin spokesman Dmitry Peskov told reporters of the talks, adding that German Chancellor Angela Merkel and French President Francois Hollande left swiftly afterward.
"Work is under way to prepare the text of a possible joint document to implement the Minsk agreements," said Peskov, referring to a widely flouted truce from September.
A French official also called the talks "constructive and substantial" and said work was being done to pull together a document aimed at implementing the September truce.
The three leaders, who did not address the media after the meeting, are to discuss the effort with Ukrainian President Poroshenko by telephone on Sunday.
The European pair's talks with the Kremlin strongman were seen an attempt to prevent the 10-month conflict in east Ukraine from spilling out of control as Washington considers whether to supply weapons to Kiev.
The visit was Merkel's first to Moscow since the start of the Ukraine crisis while Hollande had made a brief stopover in December.
Ahead of the talks, Merkel played down hopes of a rapid end to the fighting that has claimed more than 5,300 lives since April.
Merkel and Hollande first flew to Kiev on Thursday for discussions, when US Secretary of State John Kerry also visited the Ukrainian capital.
Kerry is set to meet Russia's top diplomat Sergei Lavrov at a security conference in Munich this weekend, with the high-level diplomacy seeking to resolve the worst East-West crisis since the end of the Cold War.
- 'Russia cannot redraw map' -
On Friday, US Vice President Joe Biden said Ukraine was battling for survival in the face of escalating Russian military involvement.
"We, the US and Europe as a whole, have to stand with Ukraine at this moment," Biden said in Brussels.
"Russia cannot be allowed to redraw the map of Europe.
"President Putin continues to call for new peace plans as his troops roll through the Ukrainian countryside, and he absolutely ignores every agreement his country has signed in the past," Biden said.
The West and Kiev accuse the Kremlin of sending troops and sophisticated weapons across the border to bolster separatists in Ukraine. Moscow has insisted it is not a party to the conflict.
Observers have warned that if the United States gets involved militarily the regional conflict could reach a dangerous new stage and become a proxy war between Russia and the West.
Russia is already under heavy Western sanctions over its alleged actions in Ukraine, and European Union officials said Thursday that the bloc would blacklist more Russian individuals.
The sanctions already in place along with low oil prices have dealt a blow to Russia's economy but have failed to force Putin to change tack over Ukraine.
Ahead of the talks, Hollande said a ceasefire should be "the first step" on the path to a comprehensive settlement. Kerry voiced support for what he called a "helpful" Franco-German plan.
"President Putin can make the choices that could end this war," he said.
- Evacuating civilians -
Rebel and Ukrainian forces on the ground agreed a ceasefire for several hours Friday around the battleground town of Debaltseve to allow civilians to leave, both sides said.
An AFP journalist in Debaltseve said some 25 city buses sent by both the rebels and the Kiev government left the shattered town to take civilians out, although only one separatist bus was full.
The sound of sporadic shelling could be heard in the distance but mortar bombardments in the town itself had halted after days of fierce fighting.
Hundreds of civilians have been killed over recent weeks in east Ukraine as fighting spiralled after insurgents ignored the earlier truce deal and pushed into government-held territory.
One civilian and two soldiers were killed Friday and 25 wounded in fighting over the past 24 hours, a government official said.