All this comes as U.S. and U.N. officials acknowledge they're having trouble getting Sudan to accept U.N. peacekeepers.

NPR: Darfur Violence Pits Sudan Against the U.N.

Over time and under pressure, Chinese diplomats helped persuade Sudan to accept a U.N.

CNN: 'A horror movie and a snuff movie'

Sudan has indicated it might accept a U.N. force in Darfur to aid African Union troops if a peace treaty is signed.

NPR: Thousands Rally to Urge Intervention in Sudan

World Health Organization representative William Aldis told Reuters that the U.N agency would only accept drugs that had been labeled in the language of the recipient country and that were within six months of their expiry date.

CNN: Companies bolster relief effort

On the security situation, he pushed the government of Sudan to disarm the Janjaweed and to accept an international peacekeeping force, the hybrid force of U.N. and African Union forces.

NPR: U.S. Officials Look for Political Solution to Darfur