A total of 17 people were killed and 16 others injured in clashes between two rival tribes in the southern Libyan city Ubari, local sources said on Wednesday."The clashes between the Tuareg and Tabu tribes has killed 17 people and injured 16 others from Monday to Tuesday," an official from the Ubari Municipal Council told Xinhua."The clashes ended on Tuesday. But there are still sporadic skirmishes," the official said.Libya's Prime Minister Abdullah al-Thinni is holding an emergency meeting with elders from the Tubu tribes in an attempt to seek a possible reconciliation with the Tuareg.Libya has been witnessing continuous fighting and armed attacks since the downfall of Muammar Gaddafi's government in 2011.