Ukraine, Russia and the Kremlin-backed separatists signed a cease-fire deal Friday after five months of bloodshed, and Europe readied additional sanctions on Moscow. NATO leaders created a new force designed to prevent any aggression by Russia against alliance members.
Gunfire and shelling appeared to fall silent across eastern Ukraine shortly after the appointed hour, to the relief of war-weary residents. But the U.S. voiced skepticism that the rebels and Russia would stop violating Ukrainian sovereignty.
Ukrainian President Petro Poroshenko said he ordered his forces to halt hostilities at 6 p.m. (11 a.m. EDT) after the deal was signed in Minsk, the Belarusian capital, by all three sides and a representative of the Organization for Security and Cooperation in Europe. Separatist leaders also said they ordered their forces to hold their fire.
Poroshenko said the cease-fire was based on an agreement reached during a "long conversation" with Russian President Vladimir Putin and would be watched over by international monitors from the OSCE.
The negotiators also agreed on the withdrawal of all heavy weaponry, the release of all prisoners and the delivery of humanitarian aid to devastated cities in eastern Ukraine, Heidi Tagliavini of the OSCE told reporters in Minsk.
Mikhail Zurabov, the Russian ambassador to Ukraine who also signed the deal, described the exchange of lists of more than 1,000 prisoners from each side as a "breakthrough." Poroshenko said a prisoner exchange could begin as early as Saturday.
Putin's spokesman, Dmitry Peskov, said the Kremlin welcomes the signing and hopes that all sides will fulfill the agreements and continue the negotiation process "for the full settlement of the crisis in Ukraine," the Interfax news agency reported.
U.S. President Barack Obama said he was hopeful the cease-fire would hold but skeptical that the rebels would follow through and that Russia would stop violating Ukraine's sovereignty and territorial integrity.
"It has to be tested," Obama said at the close of a two-day NATO summit in Wales.
Noting that the U.S. and Europe were finalizing even tougher sanctions on Moscow, Obama said the most effective way to ensure the cease-fire's success was to move ahead with those measures in hopes of keeping up the pressure on Russia.
German Chancellor Angela Merkel said "if certain processes get underway, we are prepared to suspend sanctions" against Russia. "We have to see whether this cease-fire is being applied. Do Russian troops withdraw, so far as they're there?" she said.
Keeping the pressure on Moscow, European Union ambassadors gave preliminary approval Friday night to new Ukraine-related sanctions on Russia involving access to capital markets and trade in arms and defense technology, dual-use goods and sensitive technologies, an EU diplomat said. More people will also be added to the trade bloc's entry ban and asset freeze, said the diplomat, who spoke on condition of anonymity because she was not authorized to make public statements on the issue. Final approval is expected Monday, with the new measures likely taking effect Tuesday, the diplomat said.
Leonid Kuchma, a former Ukrainian president who signed the deal, said there was "a genuine desire" for peace. But even though Poroshenko and the separatist leaders have ordered their forces to stop fighting, "it doesn't mean that someone will not fire from behind the corner," he said.