US Secretary of State Mike Pompeo accused the ICC of "illegitimate attempts to subject Americans to its jurisdiction", announcing sanctions against Chief Prosecutor Fatou Bensouda and the Head of the Jurisdiction Complementarity and Cooperation Division, Phakiso Mochochoko.
Mr Pompeo made the accusation as The Hague-based court probes whether US forces have committed alleged war crimes in Afghanistan.
The International Criminal Court has defended its staff sanctioned on Thursday by the United States for “targeting Americans.”
President of the Assembly of State Parties ASP O-Gon Kwon said the decision by the US Treasury to impose sanctions on Chief Prosecutor Fatou Bensouda and other officials risks encouraging impunity across the globe.