Sudan's paramilitary Rapid Support Forces and allies have signed a charter that paved the way for the establishment of a parallel government, as Sudan's army made advances recently against the rival groups.

Sudan's army said on Sunday it had seized back control of the town of el-Gitaina, just south of the capital, from the Rapid Support Forces (RSF) and broken the paramilitary group's siege on the strategic city of el-Obeid to the west.

Sudan's paramilitary Rapid Support Forces and its allies have agreed to form a parallel government, they said Sunday, despite warnings such a move could further fragment the war-ravaged country.

Sudan's Rapid Support Forces and its allies agreed on Sunday to form a parallel government in areas controlled by the paramilitary. The agreement signed said the charter will lead to the establishment of a "government of peace and unity" in rebel-controlled areas,

Sudan's Rapid Support Forces signed a charter with allied political and armed groups late on Saturday to establish a "government of peace and unity", signatories al-Hadi Idris and Ibrahim al-Mirghani told Reuters.