Khartoum: Sudan`s state security today arrested opposition leader and ex-premier Sadiq al-Mahdi, his secretary said, after he reportedly accused a counter- insurgency unit of rape and other abuses of civilians in Darfur.
"At 8:45 pm (1745 GMT) a number of state security officers came to the home of imam Sadiq Al-Mahdi with a warrant, and they arrested him," his secretary, Mohammed Zaki, told AFP.
Zaki had no further details about the arrest, which makes Mahdi one of the highest-profile figures to be detained in Sudan in recent years.
The National Intelligence and Security Service (NISS) has the right to detain people for more than four months without judicial review.
On Thursday Mahdi, who heads the major opposition Umma party, appeared before prosecutors for questioning over the allegations he made at a press conference about the Rapid Support Forces (RSF).
NISS, which has authority over the RSF, filed a criminal complaint accusing Mahdi of distorting the image of the forces, threatening public peace, undermining the prestige of the state and inciting the international community against Sudan, newspapers reported.
At a news conference in Khartoum on Wednesday, commanders of the RSF denied their force had looted, raped or committed arson.
"All the allegations against us are lies," an angry Mohammed Hamdan Dalgo, the unit`s field commander, shouted.
Mahdi`s detention comes as Umma and others opposition parties engage in a "national dialogue" with President Omar al-Bashir.
A senior opposition politician has told AFP that Umma is a main focus of the dialogue process that might lead to a new, coalition government.
The politician said Bashir is pushing for "a real change" because he realises the country is "collapsing".
The security service is resisting the dialogue process, the politician said.
A political scientist, El Shafie Mohammed El Makki, has said that even if Bashir himself is serious about reform, "not all the people in his party are for what is going on. You have to understand this."
The Bashir regime, which took power 25 years ago in an Islamist-backed coup, has faced mounting challenges since the separation of South Sudan three years ago
Inflation has soared and the Sudanese currency sank. Wars and unrest spread to about half of the country`s 18 states, and internal divisions surfaced in Bashir`s National Congress Party.