South Sudan's President Salva Kiir has dismissed his intelligence chief and two of the country's vice-presidents, replacing one of his closest allies with a senior advisor whom analysts believe Kiir may be readying to succeed him.

South Sudan's President Salva Kiir has sacked two of his vice-presidents, the country's spy chief and other senior officials. The dismissals were announced in a series of presidential decrees read on the state broadcaster. No reasons were given for the move.