The International Criminal Court's top official has called on the United States to join and support its work after Washington recently stepped up its dispute with the global legal body.
ICC president Chile Eboe-Osuji called on the US to "join her closest allies and friends at the table of the Rome Statute", referring to the court's founding document.
"The past, present and future victims of genocide, crimes against humanity and war crimes need her to do so," Eboe-Osuji said in remarks made in the US capital on Friday, released by the court on Monday.
The United States has never joined the ICC, whose chief prosecutor Fatou Bensouda asked judges in November 2017 to authorise her to open a probe into alleged war crimes in Afghanistan.
Some legal experts say the case is the Hague-based court's most complex and politically controversial investigation to date.
It could be the first time alleged crimes committed by US forces could be under the spotlight.
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In response, US Secretary of State Mike Pompeo announced two weeks ago that they would deny visas to ICC members involved in any investigations into actions of US troops in Afghanistan or other countries.
It was the US's first concrete action against the ICC since the White House threatened reprisals against the tribunal in September last year.
But Eboe-Osuji said: "It is, with all due sense of responsibility that I directly request the leadership of the United States to give its support to the ICC."