The US has announced sanctions on Russians over the poisoning of opposition leader Alexei Navalny.
The sanctions will target seven senior Russian officials and 14 entities involved in chemical production, US officials said, reports the BBC.
They said US intelligence had concluded that the Russian government was behind the near-fatal nerve agent attack on Navalny in Siberia last year.
He is the most high-profile critic of President Vladimir Putin.
Moscow denies involvement in his poisoning and disputes the conclusion, by Western weapons experts, that the nerve agent Novichok was used.