Four tribesmen from Arab Rizeigat tribe reportedly killed in clashes the weekend . Fighting part of an outbreak of violence over Sunday that killed Four . CNN 's Amir Ahmed contributed to this report . 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 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 .