The European Union and France have cut off financial support to Niger and the United States has threatened to do the same after military leaders this week announced they had overthrown the democratically elected president, Mohamed Bazoum.
French foreign ministry said France had suspended all development aid and budget support to Niger with immediate effect.
It demanded a prompt return to constitutional order with elected president Bazoum back in charge.
The Economic Community of West African States (ECOWAS) will hold an emergency summit in Nigeria on Sunday to discuss the situation.
After an emergency meeting on Friday, the African Union issued a statement demanding the military return to their barracks and restore constitutional order within 15 days. It did not say what would happen after that.
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