Niger's junta has named a new government, forcing its agenda before a summit of regional leaders who have demanded the coup leaders end their military takeover.
West African heads of state meeting in Nigeria later on Thursday aim to agree on a plan of action for Niger, where coup leaders have refused to stand down despite the bloc's threat that it could use force to restore democracy.
Since the July 26 power grab shocked the region, the defiant junta has rebuffed diplomatic overtures and ignored an August 6 deadline from the Economic Community of West African States (ECOWAS) to reinstate ousted president Mohamed Bazoum.
Mahamane Roufai Laouali, cited as Secretary General of the Government, read out 21 names on television without specifying any further plans.
Three coup leaders have been named ministers of defence, interior and sports in the government, which is about half the size of the previous one.
United Nations Secretary-General Antonio Guterres voiced concern about Bazoum and his family after his party reported they were being detained at the presidential residence without electricity or running water, and had gone days without fresh food.
"The Secretary-General... once again calls for his immediate, unconditional release and his reinstatement as Head of State," a UN spokesperson said on Wednesday.
The meeting in the Nigerian capital, Abuja, could prove a pivotal moment in the stand-off.
The bloc's leaders are expected to agree on next steps, which could include military intervention - something an ECOWAS official has said would be a last resort.
Envoys of the Nigerian president and ECOWAS chair Bola Tinubu met coup leaders in the capital, Niamey, on Wednesday, offering a glimmer of hope for dialogue after previous missions were spurned.
Any escalation would further destabilise West Africa's Sahel region, one of the world's poorest, where a long-running Islamist insurgency has displaced millions and stoked a hunger crisis.
The coup was triggered by internal politics but it has evolved into an international entanglement, with ECOWAS, the UN and Western countries putting pressure on the junta to stand down, while military governments in neighbouring Mali and Burkina Faso have vowed to defend it.
The ECOWAS summit takes place as Niger accused France of violating its airspace, attacking a military camp and freeing "terrorists" to undermine the country.
Paris has denied the charges.
Army officer Amadou Abdramane, speaking for the coup leaders, made the allegations in a video statement without providing evidence, stoking tension ahead of Thursday's meeting.
"What we are seeing is a plan to destabilise our country," Abdramane said.
France's foreign ministry rejected the accusations, saying its aircraft was operating under an existing agreement with Niger forces and its troops were in the West African nation at the request of legitimate authorities.
US troops are in Niger along with French, Italian and German forces as part of international efforts to combat Islamist insurgents devastating the Sahel region under agreements with the now-deposed civilian government.
The rhetoric against former colonial power France has been a feature of coups in the region in the past two years, including in Mali and Burkina Faso, whose army rulers are strongly backing the generals now in charge in Niamey.
