The UN aid agencies said the coalition's move to ease the siege was not enough, and warned of mass starvation and health catastrophes in Yemen's north.
McGoldrick underscored that United Nations aid was the main lifeline for most of Yemen's population, seven million of whom are at risk of starvation. More than 2,000 Yemenis have died in the epidemic. The humanitarian situation in the war-ravaged Yemen is now one of the deadliest in the world as starvation and lack of medical supplies leave millions at risk - the Saudi blockade of Yemen has added to the country's woes.
An air raid by the Saudi-led military coalition fighting against the Houthi movement in Yemen shut down the airport in the capital Sanaa on Tuesday, further isolating the country where millions are on the brink of starvation, the state news agency SABA reported.
The agency reported that the closure of Yemen's border has halted the delivery of emergency assistance for almost 280,000 internally displaced people, and stranded some of its staff outside the country while others lack fuel for transport, he said.
The coalition seeks to reinstate internationally-recognized Yemeni government of exiled President Abd-Rabbu Mansour Hadi, who was forced by Houthi rebels into exile in neighboring Saudi Arabia.
Saleh al-Sammad, the head of the Presidency Council of Yemen's rebels, also known as Houthis, told a rally of thousands of supporters marching down a main boulevard in the capital, Sanaa, that the coalition has "shut down all doors for peace and dialogue".
The U.S.is supporting a Saudi Arabia-led coalition in the conflict, with intelligence, aerial refueling and the sale of weapons.
The mission's announcement came in a statement early on Monday.
Those ports are in Yemeni cities of Aden, Mocha and Mukalla.
Saudi Arabia announced it shut down all ports after a Houthi ballistic missile attack near Riyadh's worldwide airport.
For its part, Iran long has denied supplying any arms to Yemen, though it has backed the Houthis and highlighted the high civilian casualties from the Saudi-led coalition's campaign of airstrikes.