Another top South Sudanese military official has resigned while accusing the current government of curruption and ethnic bias.

He is the fourth high-ranking official to quit President Kiir’s government in a week.

In a letter released Saturday evening, Brig. Gen. Henry Oyay Nyago, Director of Military Justice in South Sudan's army SPLA, accused President Kiir’s government of committing war crimes, crimes against humanity, genocidal acts and ethnic cleansing.

 Nyago also accused the government of overlooking crimes such as rape, systematic killings and unlawful confiscation of property belonging to civilians.

“You have been alerted by the security organs to act on reports citing consecutive killings and heavy bombardment in Jonglei in which so many civilians suffered causalities. Again, you chose to be silent,” Nyago wrote.

"Rape cases committed and being committed by your army and organized forces have become a daily game as if you cannot do anything or else you are enjoying the panorama,"he said.

Last weekend, Gen. Thomas Cirillo Swaka, who was the deputy chief of  general staff for logistics in the SPLA army, resigned while accusing President Kiir and the army leadership of pursuing a tribal agenda.

On Friday, the minister of labor and public service, Gen. Gabriel Duop Lam,  and Col. Khalid Ono Loki, head of the military courts in the SPLA army resigned.

Photo: President Kiir accompanied by army chief of staff Paul Malong Awan, during independence day celebrations in July [Jason Patinkin/AP]