The United States has threatened to impose sanctions on International Criminal Court (ICC) officials if they go ahead with an investigation into alleged war crimes committed by U.S. personnel in Afghanistan.
President Donald Trump's national security adviser, John Bolton, on September 10 called The Hague-based court "unaccountable" and "outright dangerous" to the United States, Israel, and other allies.
"For all intents and purposes, the ICC is already dead to us," he told the conservative Federalist Society in Washington.
Bolton also said that any probe into alleged war crimes committed by U.S. service members and intelligence professionals during the war in Afghanistan would be "an utterly unfounded, unjustifiable investigation."
"If the court comes after us, Israel or other U.S. allies, we will not sit quietly," he warned.
The U.S. national security adviser said Washington was prepared to slap financial sanctions and criminal charges on ICC officials if they proceed against any Americans.
"We will ban its judges and prosecutors from entering the United States. We will sanction their funds in the U.S. financial system, and we will prosecute them in the U.S. criminal system," Bolton said.
"We will do the same for any company or state that assists an ICC investigation of Americans," he added.
An ICC prosecutor requested in November 2017 to open an investigation into alleged war crimes committed by the U.S. military in Afghanistan, especially over the abuse of detainees.
Bolton said neither Afghanistan nor any other government party to the ICC's Rome Statute has requested an investigation.
But he said the ICC could formally open the investigation "any day now."
Bolton also cited a recent move by Palestinian leaders to have Israeli officials prosecuted at the ICC for war crimes.
"The United States will use any means necessary to protect our citizens and those of our allies from unjust prosecution by this illegitimate court," Bolton said.
"We will not cooperate with the ICC. We will provide no assistance to the ICC. We certainly will not join the ICC. We will let the ICC die on its own."
Earlier on September 10, Washington announced that it was closing the Palestine Liberation Organization (PLO) mission in Washington, citing the Palestinians' bid to take Israel to the ICC as one reason for the move.
State Department spokeswoman Heath Nauert said in a statement that the PLO had "refused to engage with the U.S. government with respect to peace efforts and otherwise."
Under President George W. Bush, the United States did not ratify the Rome treaty that established the ICC in 2002.
The purpose of the court is to bring perpetrators of war crimes, crimes against humanity, and genocide to justice.