PORT SUDAN, Sudan (AP) — The U.N.'s humanitarian chief arrived in Sudan’s main seaport on Wednesday to seek guarantees for the safe passage of aid deliveries, as thousands of Sudanese and foreign nationals gathered there in hopes of fleeing the conflict-torn east African country.

Martin Griffiths, the under-secretary-general for humanitarian affairs and emergency relief coordinator at the United Nations, tweeted that he came to affirm the U.N.'s commitment to the Sudanese people. He arrived in Port Sudan on the Red Sea on the last day of a shaky truce, meant to expire at midnight, which has not quelled the fighting.

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