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The British prime minister, Theresa May, is facing mounting pressure to take decisive action against whoever was behind the nerve agent attack on an ex-Russian spy and his daughter - Sergei and Yulia Skripal - in the English city of Salisbury. The foreign affairs committee chairman Tom Tugendhat told Dan Damoln that evidence was mounting against Russia, which has denied involvement in the attack. (Picture: Police officer guarding part of Salisbury where the attack happened Credit: AFP/Getty Images)