Ukraine crisis: US warns Russia as UN backs ceasefire deal. The US has accused Russia of violating the Minsk agreement on Ukraine, as the UN Security Council voted unanimously to approve the ceasefire deal. Vice-President Joe Biden said "the costs to Russia will rise" if it continued to violate the accord. Fighting is continuing around the strategic town of Debaltseve, with pro-Russian rebels saying they now control most areas. Russian President Vladimir Putin urged Ukraine's troops there to surrender. 'Ironic' Although the Security Council unanimously approved a Russian-drafted resolution to endorse the ceasefire deal agreed in Minsk, Belarus, last week, angry words were exchanged among ambassadors. US Ambassador Samantha Power said she "wholeheartedly welcomes this agreement" but said that Russia had to prove its commitment to peace.She said: "Stop arming the separatists. Stop sending hundreds of heavy weapons across the border in addition to your troops. Stop pretending you are not doing what you are doing." She added: "Russia signs agreements then does everything within its power to undermine them. Russia champions the sovereignty of nations and then acts as if a neighbour's borders do not exist." Ms Power said it was "ironic" Russia had drafted the resolution while "backing an all-out assault" in Ukraine. Russian Ambassador Vitaly Churkin called her comments "offensive". "Since the very start of the crisis, Russia has actively called for a peaceful settlement through inclusive, transparent dialogue between all sides in the internal Ukrainian conflict," he said. After speaking to Ukrainian President Petro Poroshenko, Mr Biden said he "strongly condemned the violation of the ceasefire by separatist forces acting in concert with Russian forces, in and around the town of Debaltseve". He added in a statement released by the White House: "If Russia continues to violate the Minsk agreements, including the most recent agreement signed on February 12, the costs to Russia will rise." Mr Poroshenko described rebel attempts to take the town as a "cynical attack" on the ceasefire. International observers monitoring the truce have been unable to enter Debaltseve. The town has become a key prize for rebels and government forces, as it sits on a strategic railway line linking rebel-held Donetsk and Luhansk. The wealth of claim and counter-claim around Debaltseve speaks volumes. It's hard to confirm any of Tuesday's stories. Controversy surrounds the fate of dozens of government troops - rebel sources say they surrendered, while the army contends they were captured after running out of ammunition during an ambush. The rebels say Debaltseve is not covered by the ceasefire agreement reached last week in Minsk and continue to insist that it's an "internal" matter. Between April and July last year, the town was in rebel hands. It sits astride the railway line linking two rebel strongholds, Donetsk and Luhansk. Ukrainian TV has shown pictures of text messages sent to government soldiers in Debaltseve, allegedly from Russia. "Poroshenko and his generals have betrayed you," the messages read, referring to the Ukrainian president. "There's no need for you to die for them." Mr Putin urged Ukraine to allow its troops there to surrender and said he hoped the rebels would let any captured troops return to their families. Speaking on a visit to Hungary, Mr Putin said there had been a "significant reduction" in the intensity of combat since the truce came into effect over the weekend. He said the conflict could not be solved by military means. "I hope that the Ukrainian authorities are not going to prevent the Ukrainian soldiers from laying down their weapons," he said. Mr Putin added that the fighting in Debaltseve was "understandable and predictable". He said he had warned participants in the Minsk talks that - ceasefire or no ceasefire - encircled government troops would try to break free and the rebels would try to prevent this. Trapped civilians Meanwhile, sources in the self-proclaimed Donetsk People's Republic (DPR) said Debaltseve police station and railway station had been taken, and at least 80% of the city was under rebel control. According to later reports, the city's military HQ - where many government troops are based - has also been surrounded. Most of its 25,000 population has been evacuated but about 7,000 civilians are still believed trapped by the fighting.

• published: 18 Feb 2015
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