That is incorrect. Obstruction of justice refers to interference with an investigation that the government is trying to pursue, not to the government deciding to close down an investigation.
The British government is poised to submit an extradition request to Moscow for two Russians suspected of carrying out the Salisbury nerve agent attack that left one person dead and three injured, according to Whitehall and security sources.
The move comes after months of painstaking investigation by hundreds of officers from the police and the intelligence agencies. They have pieced together the movements of the two Russians, from their entry into the UK through to their departure.
The Crown Prosecution Service, which prepared the extradition request, has completed the process and is ready to file, the sources said.
The request will reignite the simmering diplomatic row with Russia, which is certain to reject it, prompting another round of tit-for-tat diplomatic expulsions.
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The United States will impose sanctions on Russia for its use of a nerve agent in an attempt to kill a former Russian spy and his daughter in Britain.
The state department says Wednesday the sanctions will be imposed on Russia because it used a chemical weapon in violation of international law.
The Trump administration said Wednesday it would impose new sanctions against Russia as punishment for its use of a nerve agent in an attempt last March to assassinate British citizen and ex-Russian spy Sergei Skripal and his daughter.
A terse release from the State Department said that the United States had determined Russian responsibility for the attack in Salisbury, England — a British conclusion the administration had already accepted — under a 1991 U.S. law on biological and chemical weapons use that requires the president to impose sanctions.