The Sudanese government resumed peace talks with a minor rebel group in Qatar's capital on Monday, without Darfur's main rebel group, the Justice and Equality Movement (JEM). At the onset of the talks chief Sudanese negotiator Amin Hasan Omar said Khartoum is 'optimistic' about signing a final agreement with the Liberation and Justice Movement, a rebel group that is an alliance of splinter factions. Meanwhile, Qatari mediator and minister of state for foreign affairs, Ahmad Abdullah al-Mahmud, called on other rebel groups to join in the negotiations. 'We hope the negotiations will yield the anticipated results, and (that) the rest of our brothers, without any exceptions, will join,' Mahmud said. JEM had signed a framework accord in February in Doha that was hailed by the international community as a major step toward bringing peace to the region devastated by a seven-year war. But there was no final, comprehensive peace agreement by a March 15 deadline and JEM broke off from the talks that same month, claiming ceasefire violations and resumed attacking government forces. Last month, Sudan sought Interpol's help in its bid to have JEM leader Khalil Ibrahim arrested in Egypt. A Sudanese special court accuses Ibrahim of masterminding an unprecedented attack by his JEM rebels on Omdurman, the twin city of the capital. Darfur, an arid desert region the size of France, has been gripped by a civil war since 2003 that has killed 300,000 people and displaced another 2.7 million, according to UN figures. Khartoum says 10,000 people have died. 