Riyadh and Abu Dhabi put on a display of unity over
Yemen, but the capture of Aden by UAE-backed separatists exposes simmering divisions that analysts say weaken their joint campaign against Iran-linked rebels.
The seizure of the presidential palace in the southern port city on Saturday dealt a fresh blow to
Saudi Arabia, which has led a costly four-year military intervention that has failed to defeat the Huthi rebels while triggering a humanitarian crisis.
The deadly bout of fighting in Yemen's already convoluted conflict pits Saudi-backed government forces against the UAE-trained Security Belt Force -– both allied against the Huthis.