Former Libyan prime minister Mahmoud Jibril died in Egypt on Sunday after contracting the coronavirus.
Jibril served as the country's interim premier for more than seven months, from March to October 2011, during the Libyan civil war.
Khaled Al Mrimi, secretary of the Alliance of National Forces party that was founded by Jibril in 2012, said he died in Cairo after two weeks in hospital.
Coronavirus around the Middle East
In a tweet on Sunday, UAE Minister of State for Foreign Affairs Dr Anwar Gargash expressed his condolences.
"We lost today a good friend, Dr Mahmoud Jibril, the ex-Libyan prime minister who passed away in Cairo," Dr Gargash said.
"The deceased loyally worked for his country and people. True condolences and comfort to the family of the deceased."
فقدنا اليوم الصديق العزيز الدكتور محمود جبريل رئيس الوزراء الليبي الأسبق الذي وافاه الأجل في القاهرة. عمل المرحوم مخلصاً لبلاده ولشعبه. صادق العزاء والمواساة إلى أسرة المرحوم، سائلاً المولى عز وجل أن يتغمده بواسع الرحمة ويلهم أهله الصبر والسلوان.
Jibril, 68, was appointed head of the National Transitional Council during the civil war in which Libya's former leader Muammar Qaddafi was captured and killed.
Prior to this, he served as head of the National Economic Development Board for the Qaddafi regime before defecting to the rebel National Transitional Council at the start of the revolution in early 2011.