The United States is prepared to block Russia and China from any attempts to violate sanctions on Iran, U.S. Secretary of State Mike Pompeo said on Friday, one day after Washington moved to restore sanctions imposed on Tehran by the United Nations.

Pompeo, in an interview on Fox News, also said Washington was disappointed that its allies did not support the U.S. effort to push for a "snapback" of U.N. sanctions, including an arms embargo, after what the Trump administration said was Iran's violation of its 2015 nuclear deal with world powers.