The reported house arrest of Riek Machar, the former bush rebel leader who became South Sudan's First Vice President, marks the latest turn in the turbulent relationship with his rival, President Salva Kiir,

Amid rising tensions in Africa’s youngest country and reports that the country’s first vice president was arrested, Bishop Christian Carlassare called for peace.

Riek Machar, South Sudan's First Vice President and President Salva Kiir's enduring rival, was arrested on Wednesday on "unclear charges," marking a dramatic escalation to a weeks-long conflict that threatens a return to the civil war that killed hundreds of thousands.