Riek Machar, who was sacked as South Sudan’s vice-president in July after heavy clashes in the capital, Juba, is in South Africa to receive medical treatment, according his spokesman, quoted by Reuters news agency.
The former rebel leader had been receiving treatment in the Sudanese capital, Khartoum, after sustaining a leg injury.
Mr Machar, whose bitter rivalry with President Salva Kiir sparked a civil war in December 2013, fled across the border into the Democratic Republic of Congo with more than 700 of his soldiers in the wake of the July clashes.
His fighters remain in DR Congo, at a UN camp, but the Congolese government says it no longer wants to host them and has ordered them to leave.
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