In late March, Trump ordered 60 more Russian diplomats expelled from the U.S. as part of a global response to the attack - a response that included similar expulsions of diplomats from other nations checking Russia.
The State Department said Wednesday that the USA will slap Russian Federation with sanctions for using a military-grade nerve agent in an attack on United Kingdom citizen and former spy Sergei Skripal and his daughter, Yulia.
The sanctions will take effect on August 22, the State Department noted.
An official judgement on the Skripal affair has tonight been passed by the the US State Department, paving the way for new sanctions against Russian Federation.
It would reportedly include more drastic measures, such as downgrading diplomatic relations, banning the Russian airline Aeroflot from flying to the United States and cutting off almost all exports and imports.More news: Tesla board evaluating CEO's bid to take company private
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"It is possible that trade affected could potentially reach hundreds of millions of dollars", the official added.
Two more people - Dawn Sturgess and Charlie Rowley - were subsequently treated for exposure to novichok after Ms Sturgess reportedly picked up a discarded perfume bottle thought to have contained the agent.
Later on, London claimed that the Novichok-class toxin had been developed in Russian Federation.
London and its allies have accused Moscow of trying to kill the Skripals and says the two cases are likely linked. "At the same time, we are quite committed to working to maintain relations-we work on cooperative things where it is necessary to do so". The official briefed reporters under a State Department-imposed condition of anonymity.
British Prime Minister Theresa May also pressed Trump to address the poisonings when he met with Russian President Vladimir Putin in Helsinki last month. "It threatens the security of us all", the statement read.
But the Russian finance ministry, quoted by Ria-Novosti news agency, sought to allay fears, saying the measures ultimately might not be put in place, though it acknowledged that markets were "once again under pressure".