Is the US concerned about nerve gas attacks in Great Britain?

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.

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President makes the individual Supreme ruler..

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Two Russian nationals have been named as suspects in the attempted murder of former Russian spy Sergei Skripal and his daughter Yulia.

There is "sufficient evidence" to charge Alexander Petrov and Ruslan Boshirov over the attack in Salisbury, Scotland Yard and the CPS say.

They are thought to have been using the names as aliases and are about 40.

Mr Skripal, 66, and his daughter Yulia, 33, were poisoned with nerve agent Novichok in March.

The CPS is not applying to Russia for the extradition of the two men, as Russia does not have extradition agreements with the UK. A European Arrest Warrant has been obtained in case they travel to the EU, however.

In response, the Russian foreign ministry has said the names and photographs of the men "do not mean anything to Moscow".

Exclusive: Nikolai Glushkov spoke of collapse in Bristol hotel after meeting two Russians

Detectives investigating the murder of a Russian exile in London believe he was previously the target of a poisoning attempt carried out by two mysterious men from Moscow who visited him in a Bristol hotel room, the Guardian has learned.

Nikolai Glushkov, a friend of the late oligarch Boris Berezovsky and a prominent Kremlin critic, was found dead in March at his home in New Malden, south-west London. He had been strangled.

Glushkov is now thought to have survived a previous attempt to kill him by poisoning in 2013, the Guardian can reveal. Detectives are reinvestigating the incident as part of their inquiry into Glushkov’s murder, which took place a week after the novichok poisoning in Salisbury of Sergei and Yulia Skripal.

The revelation has emerged in the week that Scotland Yard named two Russian suspects in the Skripal attack as Alexander Petrov and Ruslan Boshirov. The names are believed to be fake. Theresa May told MPs this week that both were career officers working for Russia’s GRU military intelligence agency.

May’s claim that the operation to kill the Skripals was sanctioned “at a senior level” by the Russian state has prompted furious denials by Moscow. The Kremlin says it sees no reason to pursue Petrov and Boshirov, who presented genuine Russian passports when they flew on 2 March from Moscow to Gatwick airport.

In contrast to the Skripal investigation, which successfully tracked the two Russians on CCTV, detectives working on the Glushkov investigation have struggled to find leads and are yet to identify any compellingsuspects, it is understood.

Scotland Yard’s counter-terrorism command has released CCTV footage of a black van spotted around the time of Glushkov’s murder on 11 March. Officers are working on the theory that Glushkov may, like the Skripals, have been a victim of a professional assassin or assassins sent by Russia’s spy agencies.

As part of their inquiries police are re-examining a suspected attempt on Glushkov’s life in early November 2013, six months after Glushkov publicly accused the Kremlin of murdering Berezovsky. Berezovsky had been found dead at his ex-wife’s house near Ascot.

Glushkov told friends he first met the two Russians at Schiphol airport in the Netherlands. He was apprehensive about the encounter and picked the venue because of its CCTV coverage. He subsequently came across them again during a trip to Bristol, when he was staying at the Grand Hotel in Broad Street.
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Russian President Vladimir Putin says there is "nothing criminal" about the men named by UK authorities over the poisoning of ex-Russian spy Sergei Skripal and his daughter.

The UK authorities have named the men as Alexander Petrov and Ruslan Boshirov, thought to be officers of Russia's military intelligence service, the GRU.

But Mr Putin said the pair were civilians and would tell their story soon.