Mali, Niger and Burkina Faso, three West African Sahel nations ruled by military juntas, signed a security pact on Saturday promising to come to the aid of each other in case of any rebellion or external aggression.

The people of Burkina Faso woke up to military rule on Tuesday, after the army ousted President Roch Kabore, suspended the constitution, dissolved the government and national assembly, and closed the country's borders.