The United Arab Emirates' minister of state for foreign affairs, Anwar Gargash, said late on Saturday that "the Saudi-UAE coalition is a strategic necessity in light of the surrounding challenges, and Yemen is a clear example."
"As a result of our strategic relationship with Saudi Arabia, it is the one deciding whether to continue our role in supporting stability in Yemen within the Arab coalition or not," Gargash said in another tweet.
"Our engagement with Riyadh is ontological and more comprehensive, especially in the surrounding difficult circumstances and in light of our firm conviction of Riyadh's pivotal and leading role."
The UAE is a member of the Saudi-led coalition that has launched a massive air campaign in 2015 against the Iran-aligned Houthi rebels, which overran much of Yemen, including capital Sanaa, a year earlier.
Calls have grown inside the Yemeni government for expelling the UAE from the Saudi-led coalition after UAE-backed separatist forces took control of all government military camps and the presidential palace in the southern city of Aden.
According to the UN office in Yemen, at least 40 civilians have been killed and 260 injured in the clashes between UAE-backed separatists and government forces in Aden since Aug. 8.
