The leaders of the three Sahel nations issued a statement saying it was a “sovereign decision” to leave the West African bloc “without delay”.
Struggling with jihadist violence and poverty, the regimes have had tense ties with ECOWAS since coups took place in Niger last July, Burkina Faso in 2022 and Mali in 2020.
All three were suspended from ECOWAS with Niger and Mali facing heavy sanctions.
They have hardened their positions in recent months and joined forces in an “Alliance of Sahel States”.