BBC: The UK is to expel four Russian diplomats in response to Moscow's refusal to extradite the prime suspect in the murder of Alexander Litvinenko.
Foreign Secretary David Miliband also said co-operation with Russia on a range of issues was under review.
Prosecutors want Andrei Lugovoi, an ex-KGB officer, to face trial in the UK. He denies involvement.
Moscow condemned the UK's position as "immoral" and said the expulsions would have "serious consequences". UK expels four Russian diplomats (more)
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UK expels Russian diplomats
Mark Alexander
