The US blamed the attack on Vladimir Putin and said they would be issuing fresh sanctions in response to the deadly attack.
The state department says Wednesday the sanctions will be imposed on Russia because it used a chemical weapon in violation of international law.
State Department spokeswoman Heather Nauert said: “The United States determined under the Chemical and Biological Weapons Control and Warfare Elimination Act of 1991 (CBW Act) that the government of the Russian Federation has used chemical or biological weapons in violation of international law, or has used lethal chemical or biological weapons against its own nationals.”
Former Russian spy Sergei Skripal and his daughter Yulia were poisoned by Novichok, a military-grade nerve agent, in the British town of Salisbury in March.
Following a 15-day notification period, the sanctions will take effect on or around 22 August, according to the state department.
The news came on Wednesday as Republican U.S. Senator Rand Paul said he had delivered a letter from President Donald Trump to Russian President Vladimir Putin proposing cooperation.
Sanctions are thought to bring about a ban on granting licenses to export sensitive national security goods to Russia, NBC reported, quoting a senior State Department official.
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