From the Sydney Morning Herald:
An estimated 130 children or more are dying every day in war-torn Yemen from extreme hunger and disease, according to Save the Children, an international aid group.
The charity said a continuing blockade by the Saudi-led coalition fighting Yemen’s Houthi rebels aligned with the country’s former president was likely to further increase the death rate. It said more than 50,000 children are believed to have died in 2017.
The coalition closed all ports by land, sea, and air after a Houthi rebel missile fired at the airport in Riyadh. Some ports have been opened, but only the ones in territory controlled by the Saudi coalition. The airport in Sana’a and the port in Hodeidah, a key entry point for most of Yemen’s humanitarian aid, remain closed as they are in cities controlled by the Houthi.
Now United Nations sanctions monitors have told the Security Council in a confidential report the coalition is threatening the peace, security and stability of the country by blocking humanitarian aid.
“Saudi Arabia-led coalition restrictions to the delivery of humanitarian assistance fall under resolution 2216 (2015) as an obstruction to the delivery of humanitarian assistance,” the UN monitors wrote in the executive summary of their report.
PDF of resolution 2216. Here is the paragraph on humanitarian assistance.