CAIRO: The United Nations envoy to Sudan Volker Perthes, a key mediator in the country’s brutal conflict, is no longer welcome in the African country, Sudanese authorities say.

A terse statement issued by Sudan’s Foreign Ministry late on Thursday comes just weeks after the head of the country’s military, General Abdel Fattah Burhan, demanded in a letter to envoy Volker Perthes that he should be removed from his post.

UN Secretary-General António Guterres has been notified that Perthes has been formally declared “persona non grata,” the Foreign Ministry said.

Since April 15, Sudan’s military, headed by Burhan, and the paramilitary Rapid Support Forces, led by Gen. Mohammed Hamdan Dagalo, has been locked in a violent power struggle that has killed more than 860 civilians, according to Sudan’s Doctors’ Syndicate which tracks civilian casualties. The actual death tally is likely to be much higher.

Perthes has been a key mediator in Sudan since being appointed as special envoy in 2021, first during the country’s failed attempts to transition to democracy and then as relations between the military and the RSF deteriorated. Fighting exploded in April. Perthes’ native Germany condemned the announcement.

“The international community, including the German government, continues to stand fully behind Mr. Perthes and his efforts,” said Andrea Sasse, spokesperson for the Foreign Ministry, in Berlin on Friday.

She said Perthes will continue to do his job from Kenya, from where he is supporting efforts in Jeddah to get the warring parties to the table and secure a cease-fire.

In recent months, the German diplomat has received death threats and numerous calls to resign. In his letter last month, Burhan accused Perthes of “being partisan,” and negatively contributing to pre-war talks between the generals and pro-democracy groups in the weeks building up to the conflict.

Responding to these allegations, Perthes told The Associated Press that those who threatened him were marginal “extremists” and that there is a wide appreciation of UN efforts in Sudan, which has relocated its headquarters to the coastal city of Port Sudan.

The conflict between the two generals has reduced Khartoum to an urban battlefield, with many districts of the city without running water or electricity.

There have been reports of widespread looting and sexual violence, including the rape of women and girls in Khartoum.