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US, Britain discuss new Russian sanctions over Ukraine as fighting rages on despite cease-fire

  • Yevgeniya Fomichova, 60, carries food she cooked outside a damaged apartment building in Debaltseve, Ukraine, Friday, Feb. 20, 2015. After weeks of relentless fighting, the embattled Ukrainian rail hub of Debaltseve fell Wednesday to Russia-backed separatists, who hoisted a flag in triumph over the town. The Ukrainian president confirmed that he had ordered troops to pull out and the rebels reported taking hundreds of soldiers captive. (AP Photo/Vadim Ghirda)

    Yevgeniya Fomichova, 60, carries food she cooked outside a damaged apartment building in Debaltseve, Ukraine, Friday, Feb. 20, 2015. After weeks of relentless fighting, the embattled Ukrainian rail hub of Debaltseve fell Wednesday to Russia-backed separatists, who hoisted a flag in triumph over the town. The Ukrainian president confirmed that he had ordered troops to pull out and the rebels reported taking hundreds of soldiers captive. (AP Photo/Vadim Ghirda)  (The Associated Press)

  • US Secretary of State John Kerry talks during his press conference with Britain's Foreign Secretary Philip Hammond, left,  in central London Saturday Feb. 21, 2015. US Secretary of State John Kerry, in London for talks with Foreign Secretary Philip Hammond, said Russia's conduct was "simply unacceptable" and that he expected to see agreement on further international sanctions in the coming days. "Russia has engaged in an absolutely brazen and cynical process over these last days. We know to a certainty what Russia has been providing to the separatists, how Russia is involved with the separatists," he told reporters.(AP Photo/ Laura Lean/Pool)

    US Secretary of State John Kerry talks during his press conference with Britain's Foreign Secretary Philip Hammond, left, in central London Saturday Feb. 21, 2015. US Secretary of State John Kerry, in London for talks with Foreign Secretary Philip Hammond, said Russia's conduct was "simply unacceptable" and that he expected to see agreement on further international sanctions in the coming days. "Russia has engaged in an absolutely brazen and cynical process over these last days. We know to a certainty what Russia has been providing to the separatists, how Russia is involved with the separatists," he told reporters.(AP Photo/ Laura Lean/Pool)  (The Associated Press)

  • US Secretary of State John Kerry talks during his press conference with Britain's Foreign Secretary Philip Hammond, not pictured,  in central London Saturday Feb. 21, 2015. US Secretary of State John Kerry, in London for talks with Foreign Secretary Philip Hammond, said Russia's conduct was "simply unacceptable" and that he expected to see agreement on further international sanctions in the coming days. "Russia has engaged in an absolutely brazen and cynical process over these last days. We know to a certainty what Russia has been providing to the separatists, how Russia is involved with the separatists," he told reporters.(AP Photo/ Laura Lean/Pool)

    US Secretary of State John Kerry talks during his press conference with Britain's Foreign Secretary Philip Hammond, not pictured, in central London Saturday Feb. 21, 2015. US Secretary of State John Kerry, in London for talks with Foreign Secretary Philip Hammond, said Russia's conduct was "simply unacceptable" and that he expected to see agreement on further international sanctions in the coming days. "Russia has engaged in an absolutely brazen and cynical process over these last days. We know to a certainty what Russia has been providing to the separatists, how Russia is involved with the separatists," he told reporters.(AP Photo/ Laura Lean/Pool)  (The Associated Press)

The United States and Britain are discussing new sanctions against Russia as Ukraine's week-old cease-fire proves ineffective.

U.S. Secretary of State John Kerry says Moscow is being "extraordinarily craven" for supporting Ukrainian separatists in fighting that has raged on in recent days.

Kerry said before a Saturday meeting in London with British Foreign Secretary Philip Hammond that the U.S. and Britain would talk about new economic measures to pressure Russia to end such support for the rebels.

Hammond also criticized Russia's "breaches" of the cease-fire agreement, but he was less explicit about how his government might respond.

Ukraine's military and the rebels are accusing each other of keeping up the attacks.