Former diplomats on Thursday warned that the withdrawal of Niger, Mali, and Burkina Faso from the Economic Community of West African States could undermine regional stability, potentially escalating insurgency and extremism in the Sahel.

In response, Niger, Mali, and Burkina Faso announced their exit last January and accused ECOWAS of failing to safeguard member states and of aligning too closely with foreign powers.

Junta-led countries Mali, Niger and Burkina Faso officially left West Africa's main political and trade group ECOWAS on Wednesday after more than a year of diplomatic tensions. Burkina Faso, Mali and Niger have now formed their own confederation,