The Organization for the Prohibition of Chemical Weapons, the worldwide chemical weapons watchdog, concluded in April that the nerve agent Novichok, known to have been first produced by the Soviet military, had been used in the attack against the Skripals, both of whom survived, although it did not assign blame.
British police reporteldy have identified multiple Russian suspects who left the country after the poisonings of Sergei Skripal and his daughter, Yulia, in March in Salisbury, England, along with a police officer who responded to the scene.
The action is aimed at punishing President Vladimir Putin's government for having "used chemical or biological weapons in violation of worldwide law", State Department spokeswoman Heather Nauert said in a statement. "When you take a step back you realize that much of the world looks at Washington's unilateral actions as being outside the law, outside of accountability, and a very unsafe precedent", said Paul Goncharoff from the Independent Directors Association of Russian Federation.
After pressure from Republican members of Congress, the state department has determined Moscow broke worldwide law by using a military grade chemical weapon on the Skripals.
The pain starts August 22, with a broad ban on U.S. exports of any technology with a potential national-security use.
Dmitry Medvedev said Friday that if the USA introduces sanctions against Russian banks as some reports indicated, Moscow will see that as a declaration of an "economic war" and respond accordingly. Moscow has been blamed for the poisonings, but has denied any involvement.
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The Trump administration will impose sanctions on Russia under a chemical and biological warfare law following the poisoning of a former Russian agent and his daughter in the United Kingdom earlier this year, the State Department announced Wednesday.
Another senior State Department official told reporters that the administration chose to impose a "presumption of denial" for the sale to Russian Federation of "national security sensitive" USA technologies that require federal government approval. "And our American friends must understand that".
Russia's continued denial of responsibility increases the likelihood that more-sweeping US sanctions will be imposed in 90 days. Trump made no public comments on the matter, and communications aides referred all questions to the State Department, which said the USA still sought improved ties with Moscow.
Earlier, American Airlines and United Airlines stopped flying to Russian Federation.
The latest United States action follows the treasury's imposition of sanctions in March against 19 Russian citizens and five entities for interfering in the 2016 U.S. election - the toughest steps against Moscow since Trump took office.
"The theater of the absurd continues", said Dmitry Polyanskiy, Russia's first deputy representative to the United Nations.
"The UK welcomes this further action by our US allies". Waivers have been issued for foreign assistance and space flight activities, while commercial passenger aviation and other commercial goods for civilian use will be assessed on a case-by-case basis, according to the official who briefed reporters.