South Sudan President Salva Kiir Mayardit on Tuesday night sacked two state governors.

Kiir, in a decree read on state television, removed Ruweng State Governor Them Machar Kuol and Southern Liech State Governor Stephen Taker Riek.

In another decree, the president appointed Brigadier Lawrence Mabok, to replace Them Machar.

 The president also appointed Major General Stephen Thiech Yar as the new governor of Southern Liech State.

There was no immediate reason given for the changes.

The amended constitution in South Sudan gives the president powers to remove and appoint state governors.