Ibrahim Traore cited Lt Col Damiba's inability to deal with an Islamist insurgent. 

He also announced that borders were closed indefinitely and all political activities were suspended.

Lt Col Damiba's junta overthrew An elected government in January, citing a failure to halt Islamist attacks.

But his administration h

 It has also not been able to quell the jihadist violence. On Monday, 11 soldiers were killed while escorting a convoy of civilian vehicles in the country's north.

Earlier

 Friday, Lt Col Damiba urged the population to remain calm after heavy gunfire was heard in parts of the capital.

More than 20 armed soldiers - most with their faces covered - appeared on state TV shortly before 20:00 local time.

"Faced with the deteriorating situation, we tried several times to get Damiba to refocus the transition on the security question," said the statement signed by Traore.

"Damiba's actions gradually convinced us that his ambitions were diverting from what we set out to do. We decided this day to remove Damiba," it said.

A curfew from 21:00 to 05:00 was also announced.

Lt Col Damiba's whereabouts are not known.

The United States said it was "deeply concerned" by events in Burkina Faso and encouraged its citizens to limit movements in the country. 

"We call for a return to calm and restraint by all actors," a State Department spokesperson said.

The Economic Community of West African States (ECOWAS) condemned the move, stating it "reaffirms its unreserved opposition to any taking or maintaining of the power by unconstitutional means".

Before dawn, shots and explosions were heard in the capital, Ouagadougou, some are coming from near the presidential palace and main military barracks.

After sunrise, the usually

 bustling city was largely deserted, with soldiers on the streets blocking some roads and guarding key strategic points.

State television had stopped broadcasting and more gunfire was heard later in the day.

Lt Col Damiba said there was a "confused situation" created by "mood swings" among some soldiers as rumours of a coup intensified. 

Urging people to remain calm and avoid social media speculation, the military leader said there were "negotiations under way to bring back calm and serenity".