The International Committee of the Red Cross has facilitated the release and repatriation of nearly 100 Yemeni prisoners.
Riyadh cut ties with Tehran in 2016 after Iranian protesters attacked Saudi diplomatic missions in Iran after the kingdom executed Shia cleric Nimr al Nimr.
Hans Grundberg is scheduled to meet Houthi rebel officials during his first Sanaa visit since taking office in September.
The UN said the emergency part of a two-stage operation would see the toxic cargo pumped from the storage platform to a temporary replacement vessel at a cost of $79.6 million.
During the two-month truce, the Saudi-led coalition will allow 18 vessels carrying fuel into the port of Hodeida, and two commercial flights a week from the Yemeni capital to Jordan.
The Houthi rebels said the peace initiative could be a lasting commitment if the Saudi-led coalition fighting in Yemen stopped air strikes and lifted port restrictions.
After hours of talks with the pilots, team principals and Saudi officials, Formula One and governing body the FIA said it received "assurances" that the race in Jeddah can be held safely.
Saudi-led coalition has said attacks targeted Aramco's water desalination plant and power station in the southern city of the kingdom, and a gas facility in Khamis Mushait.
"One of the world's gravest global humanitarian catastrophes" in Yemen has left 19 million people facing hunger this year, including 160,000 likely to face "famine-like conditions," UN humanitarian chief Martin Griffiths tells UNSC.
UN's children’s humanitarian aid organisation, UNICEF, said 47 children were killed or wounded in Yemen's civil war in the first two months of 2022.
At least 12 people were injured, including travellers and workers of various nationalities, the Saudi-led coalition fighting Yemen's Houthi rebel group said.
Latest Israeli attack targeting the vicinity of the Syrian capital caused some material damage, regime media says.
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