South Sudan army and rebels clash, at least 15 dead

By Denis Dumo JUBA (Reuters) - South Sudanese soldiers and rebels said they clashed in a state bordering Sudan, killing at least 15 people as violence raged on in the world's youngest nation after months of failed talks and peace accords. The army said it moved in after spotting rebels loyal to former vice president Riek Machar trying to steal cattle in the small village of Adaab el Bahr in Unity State on Wednesday evening. South Sudan seceded from Sudan in 2011 - a development greeted at the ti