The head of Niger's presidential guard, General Abdourahamane Tiani, appeared on Friday on state television as the president of the transitional council that seized power in a coup.
The guard instigated the coup on Wednesday and detained President Mohamed Bazoum in the presidential palace.
A group of soldiers, who later appeared on state television, said they had stripped Bazoum of power.
Colonel Amadou Abdramane, who announced the coup, said the military had acted in response to deteriorating security and bad governance.
Abdourahamane Tiani reiterated that soldiers seized power due to the worsening security. He also criticised the non-cooperation with military governments in Burkina Faso and Mali in the fight against insurgencies in the region.
Insecurity has remained a problem since Bazoum was elected in 2021 as miliants that took root in Mali in 2012 gained ground, killing thousands and displacing over 6 million across the Sahel.
Niger is a key ally of Western countries against insurgencies in West Africa and a number of foreign troops are based there, including French and American.
President Donald Trump said talks with Iran to end the war could soon resume and end in a deal, telling the world to watch out for an "amazing two days", while US forces imposing a blockade turned back vessels leaving Iranian ports.
A student shot at least four people dead including fellow pupils and wounded at least 20 others at a middle school in southeastern Turkey on Wednesday, the local governor said, marking the country's second school attack in two days.
At least 17 people died and 36 others were injured following a suspected boiler explosion at a power plant operated by India's Vedanta Ltd in the central Indian state of Chhattisgarh, a government official said on Wednesday.
US Secretary of State Marco Rubio hosted a rare meeting between Israeli and Lebanese envoys in Washington on Tuesday, saying he hoped the two countries would agree to a framework for a peace process, even as Israel pressed its war on Hezbollah.
Negotiating teams from the US and Iran could return to Islamabad this week to resume talks to end the war, sources told Reuters on Tuesday, after the collapse of weekend negotiations prompted Washington to impose a blockade on Iranian ports.