The West African bloc ECOWAS on Tuesday said it "firmly condemns" the coup in Burkina Faso and said President Roch Marc Christian Kabore had stepped down under duress.

"The situation in Burkina Faso is characterised as a military coup," carried out on Monday "following (Kabore's) resignation, obtained under threat, intimidation and pressure from soldiers after two days of mutiny," the bloc said in a statement issued after a special summit.