In the letter, dated 4 November but just released, O’Flaherty cites the cases of Akif Gurbanov, Alasgar Mammadli, Imran Aliyev and Anar Mammadli, all of whom were held earlier this year on charges of foreign currency smuggling,

The U.N.'s climate chief called on leaders of the world's biggest economies on Saturday to send a signal of support for global climate finance efforts when they meet in Rio de Janeiro next week, to help trigger a deal at COP29 talks.

With negotiations on climate finance in Baku at a standstill, leaders are turning to the G20 meeting in Brazil for a breakthrough .