Saudi Crown Prince Mohammed bin Salman accused its regional rival Iran of supplying the missile but Iranian President Hassan Rouhani denied arming the Houthis and said the attack was a "reaction" by Yemenis to coalition air strikes.
Sen. Chris Murphy, a Democrat from CT, took to the floor of the U.S. Senate Monday to draw attention to the "humanitarian nightmare" unfolding in Yemen - in part due to U.S. military assistance of the Saudi-led coalition laying seige to the country.
The U.N. children's agency UNICEF had only three weeks of vaccine supplies left in Yemen, and both UNICEF and the World Health Organization had shipments of essential medicines and vaccines blocked in Djibouti, McGoldrick said.
Saudi Arabia announced Monday that the Saudi-led coalition fighting Shiite rebels in Yemen will begin reopening airports and seaports in the Arab world's poorest country, days after closing them over a rebel ballistic missile attack on Riyadh.
The coalition said Monday that it would reopen ports in areas held by allied forces and loosen restrictions it had raised after the firing of the missile, which was intercepted near Riyadh's global airport.
Like the capital, Sanaa, Hodeida and Salif are in rebel-held territory.
The coalition argues that ships docking at Hodeida port are used for arms smuggling to the Huthi rebels.
So far, 29 vessels with 300,000 tonnes of food and 192,000 tonnes of fuel had been prevented from reaching Yemen, and a United Nations ship transporting 1,300 tonnes of health, WASH (water, sanitation and hygiene) and nutrition supplies had been unable to dock at Hudaydah, they added. But the coalition has made little progress, and the rebels still control much of northern Yemen, including the capital, Sanaa.
"Even before this latest blockade, based on this calculation Yemen would expect to see about 50,000 malnourished children under the age of five die from hunger or disease this year", the group said Wednesday, adding that this amounts to roughly one child dying in Yemen every 10 minutes.
"To deprive this many from the basic means of survival is an unconscionable act and a violation of humanitarian principles and law", the agency directors warned.
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.