Summary Aid trucks looted, says United Nations aid chiefViolence undermining chance of lasting truceGuterres says situation 'unacceptable'UN aid chief Griffiths arrives in Port SudanImproving humanitarian access is a priority -UNKHARTOUM, May 3 (Reuters) - The United Nations said on Wednesday it was seeking assurances from Sudan's warring factions on the safe delivery of aid after six trucks of humanitarian supplies were looted and air strikes in Khartoum undermined a new ceasefire. The conflict has created a humanitarian crisis, with about 100,000 people forced to flee with little food or water to neighbouring countries, the United Nations said. Aid deliveries have been held up in a nation of 46 million people where about one-third had already relied on humanitarian assistance. A broader disaster could be in the making as Sudan's impoverished neighbours grapple with the influx of refugees. Caught between army air strikes overhead and RSF soldiers on the ground, many citizens feel forced to take sides.

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