Saudi Arabia and its allies fighting in Yemen are obstructing deliveries of fuel for UN planes which are bringing some of the only aid into the starving country, a  UN Development Programme (UNDP) official has said.
Jet fuel deliveries to the rebel-held capital of Sanaa had been blocked by Riyadh, Auke Lootsma, UNDP’s country director, told reporters via a video link from the city on Tuesday. 
There are supposed to be two UN humanitarian flights a day into Sanaa, but planes currently in the city are stranded thanks to a lack of fuel for making the return trips to Jordan and Djibouti. 
The fuel comes from the port city of Aden, which is under the control of the internationally recognised Saudi-backed Yemeni government. 
“We have difficulties obtaining permission from the coalition and from the government of Yemen to transport this jet fuel to Sanaa to facilitate these flights,” Mr Lootsma said.
Asked why the jet …