UK is attacked in Litvinenko row
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The Kremlin attacks the UK's decision to expel four Russian diplomats as "groundless, inappropriate, unjustified".
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The UK extradition request over Alexander Litvinenko's murder is "pure foolishness", President Putin says.
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Russia and Britain traded threats and recrimination on Tuesday as a diplomatic feud over the role of the British government's cultural arm worsened.
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Britain on Monday made an official request to Russia to extradite the man suspected of killing ex-KGB agent Alexander Litvinenko with radioactive polonium-210, deepening a rift between the former Cold War foes.
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British officials chose unusually sharp language to protest Moscowâs refusal to extradite the man accused of murdering a former KGB agent.
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Japan, Britain and the European Union all expressed worries on Tuesday about RussiaÂs actions.
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Britain ordered the expulsion of four Russian diplomats on Monday over Moscow's refusal to hand over the main suspect in the murder of ex-KGB agent Alexander Litvinenko, escalating tension between Russia and the West.
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Some recent disputes that have worsened tensions between Russia and Britain:
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Russian media commentators criticise Britain's request for the extradition of Alexander Litvinenko's alleged poisoner Andrei Lugovoi.
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British prosecutors seek extradition of a Russian suspect in the murder of an ex-KGB man.  But the Kremlin is balking
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Russia expelled four British diplomats  on Thursday and suspended cooperation with London on fighting  terrorism, as a bitter row over Moscow&#39;s refusal to extradite a  murder suspect escalated.
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MOSCOW, May 23 -- A senior Russian government minister Wednesday blithely dismissed any possibility of a deterioration in relations with London because of Britain's demand that a former KGB agent be extradited to stand trial for the murder of Alexander Litvinenko, the exiled Kremlin critic who was...
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'KGB tactics' threaten EU partnership agreement as Miliband wades into crisis over staff intimidation
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Russian Foreign Minister Sergei Lavrov said on Monday the Litvinenko affair was damaging ties with Britain, which sent detectives to Moscow as part of their investigation into the ex-KGB spy's death by poisoning.
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Britain is using the murder of Alexander Litvinenko to start a "political campaign", Russia's foreign minister says.
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Britain was Wednesday waiting for a response from Russia, which has said it is planning a &quot;targeted and appropriate&quot; reply, in the ongoing diplomatic dispute between the two countries.
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Britain said on Monday it would expel four Russian diplomats over Moscow's refusal to extradite the main suspect in the murder of former KGB agent Alexander Litvinenko, a move likely to hurt ties and provoke retaliation.