Talks aimed at finding a solution to the Darfur crisis in western Sudan have been abruptly postponed. The Sudan Liberation Movement says it will no longer talk directly to the government until its security concerns are addressed. The group says the 3,000-strong African Union (AU) force, to begin deployment in Darfur on Thursday, is not enough. Meanwhile, a UN envoy says violence on the ground, which has already displaced 1.5 million people, is increasing. Full Story