The ship entered Djibouti waters yesterday and after inspection by the international organization will head towards Yemen.
The Iran Shahed vessel, carrying 2,500 tonnes of food and medical supplies, was previously bound for the Yemeni port of Hodaida before Iran agreed on Wednesday to allow the inspection by U.N. officials.
A trickle of aid, medicine and commercial food cargoes is reaching Yemen yet the process remains slow as more ships await clearance to discharge at ports and logistical chains buckle due to fuel shortages and war.