source: Sudans Post; Eye Radio (South Sudan)
actor1: Gaajok-Cie Khor-Eastern Jikany Sub-Clan Militia (South Sudan)
actor2: Gaajok-Cie Guandong-Eastern Jikany Sub-Clan Militia (South Sudan)
location: Ulang
notes: On 28 May 2021, the Cie Khor and Cie Guandong sub-subsections of the Cieng Chuol Duong of the Gaajok section of the Eastern Jikany Nuer clashed at an unspecified location in Ulang county (Upper Nile state), killing at least 43 (27 from one of the parties, and 16 from the other), and wounding an unknown number. The event is said to relate to a murder of a young man in April.