Khartoum – The Sudanese government has maintained that South Sudan's former vice president, Riek Machar, is in Sudan "purely on humanitarian reasons".
According to Sudan's News Agency, Suna, Sudan's Information Minister Ahmed Bilal Osman confirmed in a statement that Machar needed urgent medical attention.
Machar fled the country following clashes with President Salva Kiir's army in the capital Juba on July 8. The clashes resulted in the death of at least 300 people.
Machar's rebel group said at the time that he had gone to a safe country within the region.
He was replaced by Taban Deng Gai as the country's first president.
Reports on Tuesday, however, indicated that he had since arrived in Khartoum, with the Sudanese government saying that he was in the country for "medical treatment" after he escaped to the Democratic Republic of Congo following the clashes in July.
"The health condition of Dr Riek Machar is now stable and he will stay in the country under full medical supervision until he leaves the country for a destination of his choice to complete his medical treatment," Osman was quoted as saying in a statement.
South Sudan has suffered more than two years of civil war, since gaining independence from Sudan in 2011.