May says 'highly likely' Russia behind nerve attack on spy

British Prime Minister Theresa May said on Monday it was "highly likely" that Moscow was responsible for the poisoning in England of former Russian double agent Sergei Skripal and his daughter using a military-grade nerve agent.May told parliament that either the Russian state was directly responsible for the poisoning or it had allowed the nerve agent to get into the hands of others.London had given Russia until Wednesday to explain its use.