The Niger Republic is waiting for a response from the West African regional bloc, the Economic Community Of West African States, ECOWAS, after coup leaders in Niamey ignored a deadline to reinstate the ousted president—a move the bloc has warned could lead it to authorize military intervention.

ECOWAS has said it will issue a statement on its next steps in response to the junta’s refusal to cave in to external pressure to stand down by Sunday following the July 26 power grab.

The bloc has taken a hard stance on the region’s seventh coup in three years. Given its uranium and oil riches and its pivotal role in a war with Islamist militants, Niger also holds importance for the United States, Europe, China, and Russia.

On Sunday, as the deadline expired, the junta closed its airspace until further notice, citing the increased threat of military intervention.

An escalation in the standoff with ECOWAS could further destabilize one of the world’s poorest regions, which is in the grip of a hunger crisis and battling an insurgency that has killed thousands and forced millions to flee.

ECOWAS defense chiefs have agreed on a possible military action plan, including when and where to strike if the detained president, Mohamed Bazoum, is not released and reinstated.

Any military intervention could be complicated by a promise from juntas in neighboring Mali and Burkina Faso to come to Niger’s defense if needed.

On Sunday, Italy said it had reduced its troop numbers in Niger to make room in its military base for Italian civilians who may need protection if security deteriorates.