Sudan has asked the international community to list the Darfur rebel that led the weekend attack near the capital as a terrorist group.
It wants Justice and Equality Movement leaders living abroad to be handed over to the authorities in Khartoum.
Meanwhile, the officer heading Darfur's peace force says Saturday's raid in which more than 200 people died will set the Darfur peace process back.
He told the BBC it would harden attitudes and bring more suffering.
Gen Sudan fighting ...
Envoys walk out of UN after Libya Holocaust remark ... Martin Luther Agwai commands the 9,000-strong UN-African Union force which is responsible for trying to protect civilians and maintain peace in Darfur.
Saturday's raid on Omdurman, Khartoum's twin city across the River Nile, was the closest Darfur's rebel groups had come to the capital in five years of conflict in the region.
The BBC's Amber Henshaw in Khartoum says mass arrests continue to be carried out across the city as the authorities continue to search for rebels still hiding or anyone linked to them.
Human rights activists say they are concerned about people being mistreated, tortured or even killed.
They say hundreds of Darfuris are being rounded up.
Sudan has accused neighbouring Chad of backing Jem and has cut diplomatic relations.
Chad has denied the charges and closed its border, saying Sudan is planning an attack.
Sudan's government has doubled the reward for the capture of Jem leader Khalil Ibrahim to $250,000.
(BBC)
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