The US has imposed sanctions on the International Criminal Court hours after one of its former judges won the Nobel Peace Prize, as the court called on member states to ensure it can continue to function.
The ICC said on Friday that it will continue to "fully discharge its mandate."
The court also said US sanctions are "aimed at disrupting the court's operations and at intimidating those who work for or cooperate with the court."
The ICC's deputy prosecutor, Nazhat Shameem Khan, condemned the sanctions and said they would not halt the tribunal's work.
"The sanctions are intended to undermine the rule of law internationally and the work that an independent judicial institution is doing," Khan said.
"Our work will continue across all our situations, our investigations and our prosecutions."
The US has previously imposed sanctions on its prosecutors and judges.
The move would go far further by potentially punishing companies that provide services to the court itself.
"President Trump will never allow the International Criminal Court to prosecute Americans," Secretary of State Marco Rubio said in a statement ahead of the official announcement.
"That is why, today, the United States is sanctioning the International Criminal Court. We will ban transactions with this rogue court, cutting off its resources and crippling its ability to operate."
Washington has long been angry over ICC arrest warrants issued for Israeli officials, including Prime Minister Benjamin Netanyahu, and over a past investigation into actions of US soldiers in Afghanistan, which the ICC has since closed.
‘International law under political attack’
The court, founded in 2002 to prosecute war crimes, crimes against humanity and genocide, counts 125 countries as member states, including all EU countries.
It has received strong public backing in the past from member countries, including major US allies, and is based in the Netherlands.
Navi Pillay, the South African jurist who won the Nobel Peace Prize on Friday for her work in international criminal justice, served as a judge on the ICC's Appeals Chamber from 2003 to 2008.
In its citation, the prize committee said it had sought to "issue a reminder" at a time when "judges and institutions of international law are under political attack".
"An international legal system in which war criminals are held to account, and the victims of abuse see justice served, is a precondition for a peaceful world," the committee said.
Rubio said the sanctions had been structured to give the court and its member states an opportunity to address US concerns.
He did not provide further details, but a senior State Department official said the US Treasury would issue a set of licences "to protect American interests", an apparent reference to temporary exemptions to some sanctions.
‘Reining in ICC’
US sanctions typically bar all US-based companies from any work with a sanctioned organisation, forcing banks to shut accounts, insurers to end coverage and software companies to halt cooperation.
Court officials have been preparing for months for the prospect of sanctions on the court itself, shifting office computers from Microsoft software to open-source equivalents and making new arrangements for banking and health insurance.
The court's registrar, Osvaldo Zavala Giler, called earlier this week for the EU to be prepared to use a so-called "blocking mechanism" that lets it shield European countries from the extraterritorial effects of sanctions.
In his statement, Rubio said the United States had delayed its sanctions, hoping that the ICC and the countries party to its founding Rome Statute would address US concerns, but they had failed to do so.
"Either the ICC will end its threats, or we will end the ICC. We expect our allies, many of whom are part of the ICC and who rely on American service members for their defence, to rein in the court," Rubio said.
"We have structured this action to provide an opportunity for States Parties to negotiate and present a solution to address our concerns. If these efforts do not bear fruit, we will continue to adjust accordingly," Rubio said.
