(JNS) The United States will sanction China and Russia if they sell arms to Iran, said U.S. Secretary of State Mike Pompeo.

“We’re going to go after every violation that we can muster the resources to respond to,” he told The Washington Examiner. “That will be [the case], whether it’s Chinese violations or violations from the Russians, arms or economic sales; these U.N. Security Council resolutions are serious business.”

His threat reiterates his warning to those who violate the U.N. arms embargo on Iran, which was extended indefinitely on Saturday as the United States activated the mechanism last month to enact U.N. snapback sanctions on the regime under Security Council Resolution 2231, which endorsed the 2015 Iran nuclear deal and lifted six U.N. Security Council resolutions sanctioning Iran.