Iran and Saudi Arabia were already in opposing camps regarding a solution to Syria's civil war. A UN envoy is trying to keep the process on track.
A secure, stable and united Yemen anytime soon looks sadly unlikely.
The humanitarian crisis is deepening and the chances of a political solution soon seem very slim.
Houthi rebels have agreed to a five-day truce proposed by Saudi Arabia to allow aid into the country. The UN estimates that at least 300,000 Yemenis have been displaced by the fighting.