President Trump is imposing new sanctions on Russia in response to the use of a chemical weapon in an assassination attempt that took place on British soil, the State Department announced Wednesday.

“[T]he United States, on Aug. 6, 2018, 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,” State Department spokeswoman Heather Nauert said in an afternoon bulletin.