The New York Times reports that the United Nations is pulling its staff from the besieged Yemeni port city of Al Hudaydah as a massive assault on the country's only major humanitarian lifeline appears imminent. 

UN staff have played a key role in delivering foreign aid through what is now one of the besieged country's only humanitarian access points to the outside world, through which 80% of all humanitarian aid flows. 

The NYT details that the UN evacuation comes after "member countries were told that an attack by forces led by the United Arab Emirates was imminent, according to two diplomats briefed on the matter."