President Muhammadu Buhari has been delegating the vice president to represent Nigeria at a series of ECOWAS leaders’ summits.
Senegal will face the winner of Thursday’s semi-final game between Egypt and host Cameroon. The final game will be played on Sunday.
At least two people were reportedly killed in the attack that took place as President Umaro Sissoco Embaló was chairing a cabinet meeting Tuesday afternoon.
Last November, Mr Buhari, an ex-military dictator, insisted that coups should not be tolerated in Africa.
The coup in Burkina Faso is the fourth in the West African region in 18 months.
Dango Ouattara, who was sent off in the closing stages, scored on the stroke of halftime to give his side the victory.
The world body is calling for the release of ousted President Roch Marc Kaboré and other officials detained by the military.
The coup plotters said various sections of Burkina Faso’s society would be convened to agree on a roadmap to plan and carry out needed reforms.
The coup in Burkina Faso is West Africa’s third in nine months, following military takeovers in Mali and Guinea.
Mr Guterres, in a statement issued by his spokesperson Stephane Dujarric, called on the coup leaders to lay down their weapons.
