Soldiers were said took up positions along the avenue leading to the presidency and blocked access to administrative buildings and the national television, which had stopped broadcasting.
A government spokesman could not be reached.
It was not clear yet if this was a coup attempt but it bore the hallmarks of other power grabs that have swept across West and Central Africa over the past two years.
A military junta led by Colonel Paul-Henri Sandaogo Damiba took power Burkina Faso in a coup on Jan. 24.
That takeover was largely celebrated by civilians fed up with former President Roch Kabore’s civilian government that was unable to rein in Islamist militants who have killed thousands of civilians in recent years and taken over large parts of the north and east.
In his first statement after the January coup, Damiba, often seen in public in military fatigues and aviator sunglasses, pledged to restore security.
But attacks in the impoverished West African country have worsened and the army is in disarray. The rank and file, which gave Damiba their support in January, have grown frustrated at the lack of progress, security sources say.
This week, unknown assailants killed 11 soldiers in an attack on a 150-vehicle convoy taking supplies to a town in northern Burkina Faso. Fifty civilians are missing.
Militants have blockaded areas of the north, leaving communities stranded. Government convoys and air drops deliver essential goods to trapped civilians.
Meanwhile, many cities and towns not under siege have seen their populations swell as people flee violence in the countryside. Health systems are stretched. Drought has led to high levels of malnutrition.
Protests against the military have cropped up in cities across Burkina Faso this week.
Much of the country has become ungovernable since 2018. Millions have fled their homes, fearing further raids by gunmen who frequently descend on rural communities on motorbikes. Thousands have been killed in attacks.
Burkina Faso has become the epicentre of the violence that began in neighbouring Mali in 2012 but which has since spread across the arid expanse of the Sahel region south of the Sahara Desert.
As well as Burkina Faso, Mali, Chad, and Guinea have all seen coups since 2020, raising fears about a backslide towards military rule in a region that has made democratic progress in recent decades.
By Thiam Ndiaga and Anne Mimault, Reuters
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