The Russian Embassy in Washington confirmed that US countermeasures in the context of the Strategic and Offensive Arms Reduction Treaty (START) will not affect Russia's position. The US State Department said that Washington began on Thursday to withhold notifications of the New START treaty from Russia, including missile and bomber sites.

The New START Treaty, signed in 2010, limits the number of strategic nuclear warheads the two countries can deploy. On Feb. 21, Putin said Russia would suspend its participation in the treaty, undermining U.S.-Russian coordination on nuclear non-proliferation.