Acting Attorney General Todd Blanche sent a letter Thursday to International Criminal Court President Tomoko Akane declaring that the United States “unequivocally rejects” any attempt by the court to assert jurisdiction over U.S. citizens and vowed the Justice Department would not cooperate with ICC investigations involving Americans.

“The United States Department of Justice unequivocally rejects any assertion of jurisdiction by the International Criminal Court (ICC) over U.S. persons,” Blanche wrote.