The US has revoked the entry visa of the Prosecutor of the International Criminal Court, Fatou Bensouda, in response to her investigation of possible war crimes committed by US forces in Afghanistan, Reuters reported. 

In March, Secretary of State Mike Pompeo announced the United States would withdraw or refuse to issue visas to ICC officials investigating such accusations against US forces or their allies.

UN human rights experts considers the Washington reaction to be an inappropriate interference in the work of the World Court of Permanent War Crimes.

"We can confirm that the U.S. authorities have revoked the prosecutor's visa for entry into the U.S.," Bensouda's office told Reuters in an e-mail.

According to her, the move should not impact Bensouda's travel to the U.S. to meet her United Nations obligations.

A State Department spokesman said members of international organisations planning official travel to the U.N. could apply for diplomatic visas. "We recommend that applicants apply as early as possible to maximize the chances of being found eligible," the spokesman said.

Bensouda has been investigating alleged war crimes by all parties in the conflict in Afghanistan since November 2017, as well as the possible role of US personnel in relation to the detention of suspects.

ICC judges are still reviewing materials and have not yet handed down a decision on opening a formal investigation in Afghanistan.

The ICC is a court of last resort with 122 member states. It acts only when countries within its jurisdiction are found to be unable or unwilling to seriously investigate war crimes, genocide or other serious atrocities.