Russia-UK tensions risk escalating over ex-spy's poisoning

Russia has missed Britain's deadline for answers on the poisoning of former double agent Sergei Skripal and his daughter.

    UK Prime Minister Theresa May has asked for answers as to why a Soviet-era nerve agent was used to poison former Russian spy Skripal and his daughter.

    The Kremlin says it will not respond without samples of the substance.

    May is expected to discuss Britain's reply when she meets her National Security Council later on Wednesday.

    Al Jazeera's Barnaby Phillips reports from Westminster.


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