Mali and Burkina Faso will send a joint official delegation to coup-hit Niger on Monday in a show of solidarity between the nations – all of whom are ruled by juntas. Meanwhile regional bloc Ecowas said an immediate military intervention to restore Niger's toppled president was not envisaged.
The delegation, announced by the Malian army, is expected to arrive in Niger on Monday, according to Niger's foreign ministry.
The country's coup leaders defied a Sunday deadline from the West African bloc Ecowas to reinstate democratically elected President Mohamed Bazoum or face possible military action.
Mali and Burkina Faso, where the military also took power by force in 2020 and 2022, warned in a joint statement that they would consider military intervention as a declaration of war.
France said it would suspend development aid and budgetary assistance to Burkina Faso over the move.
West African regional bloc ECOWAS will hold a summit in Nigeria's capital Abuja on Thursday to discuss the coup in Niger, ECOWAS spokesperson Emos Lungu told Reuters on Monday.
Niger closes airspace
Thousands gathered in the capital Niamey in rallies backing the soldiers and denouncing possible foreign intervention, military commanders sealed off the country's airspace until further notice, the junta said in a statement.
Any attempt to violate the country's airspace would meet with an energetic and immediate response", the statement added.
Air France has suspended flights to and from Ouagadougou in Burkina Faso and Bamako in Mali until 11 August, the company said on Monday.
Meanwhile France has warned against all travel in Niger.
"French nationals in Niger should be extremely vigilant, the foreign ministry said on its website. "It is essential to limit travel, to stay away from any gatherings and to keep themselves regularly informed of the situation."
Deadline passed
Regional bloc Ecowas gave the military officers until Sunday night to release Bazoum from his residence, where members of the presidential guard have been holding him since 26 July.
Ecowas will hold a summit in the Nigerian capital Abuja on Thursday.
A source told the French press agency AFP that an immediate military intervention to restore Niger's toppled president was not envisaged.
Algeria and Chad, which are not part of Ecowas but share borders with Niger, both said they would not participate in any potential military operation.