Four tribesmen from Arab Rizeigat tribe reportedly killed in clashes the weekend . Fighting part of an outbreak of violence over Sunday that killed Four . Arab government officials accuse People 's Liberation Army of instigating the violence , according to state TV .
Four tribesmen from Arab Rizeigat tribe reportedly killed in clashes Sunday . Fighting part of an outbreak of violence over the weekend that killed as many as 54 . Sudanese government officials accuse SPLA of instigating the violence , according to state TV .