Abdallah Al-Mouallimi said the reopening of the ports was for the "safe transfer of humanitarian actors and humanitarian and commercial shipments" into Yemen. "We have some 21 million people needing assistance and seven million of those are in famine-like conditions and rely completely on food aid", United Nations humanitarian coordinator for Yemen Jamie McGoldrick said.
Without Sanaa airport and Hudaydah and Saleef seaports fully functioning and receiving cargo, the dire humanitarian situation will deteriorate further. McGoldrick was speaking to reporters in Geneva by phone from Amman, because he said flights into Sanaa were blocked.
So far, Saudi wants to bring supplies into Yemen via the ports of Jizan and Aden, a plan McGoldrick said was risky and slow.
Some UNHCR staff have also been affected, with some stranded outside the country and others lacking fuel for transport.
The Saudi-led military coalition fighting Yemen's Houthi rebels last week announced it had closed all air, land and seaports in Yemen to stem what it said was the flow of arms to the Houthis from Iran.
Saudi Arabia said Monday that the coalition would reopen seaports and airports in areas controlled by the Yemeni government, but those in rebel-held areas, including Hudaydah and Sanaa, would remain closed.
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He added: "We believe that there should be a more robust verification mechanism in Hodeidah port and we want to work with the United Nations".
The U.S. House of Representatives overwhelmingly voted for a resolution declaring that U.S. military assistance to Saudi Arabia in its war in Yemen is not authorized under previous legislation which has given the president power to combat terror overseas and invade Iraq in 2003.
The United Nations has warned a total blockade could cause starvation in Yemen, where war has killed at least 10,000 people in the last two and a half years.
Yemenia Airlines Chief Saleh Ba Hedile said in a statement at Cairo Airport that the flights resumed following the Saudi-led coalition lifted restriction on air travel to Yemen.
After a November 4 ballistic missile attack near the Riyadh global airport by Houthi rebels, Saudi Arabia had announced it shut down all ports in Yemen. More than 2,000 Yemenis have died in a cholera outbreak now affecting almost one million people, AFP reported.