The UN migration agency has warned that humanitarian efforts in Sudan's war-torn North Darfur region might come to a complete halt unless immediate funding and safe delivery of relief supplies are ensured.

"Despite the rising need, humanitarian operations are now on the brink of collapse," the International Organization for Migration (IOM) said in a statement.

"Warehouses are nearly empty, aid convoys face significant insecurity, and access restrictions continue to prevent the delivery of sufficient aid."

The IOM said more funding is needed to ease the humanitarian impact of the war between the Sudanese army and its rival, the paramilitary Rapid Support Forces. The agency warned of "an even greater catastrophe" if its appeal went unheeded.

"Our teams are responding, but insecurity and

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