On November 26, armed attackers stormed a military armoury, two barracks, two prisons, and two police stations, clashing with security forces.
Twenty-one people were killed and hundreds of prisoners escaped before authorities were able to regain control after what they deemed a coup attempt by members of the armed forces.
The violence sparked fears of another coup in West Africa, where Mali, Burkina Faso, Niger and Guinea have all experienced putsches since 2020.
Sierra Leone on Tuesday charged 12 people with treason in connection with the coup attempt, including Amadu Koita, a former soldier and bodyguard of Koroma.
Koroma, who led the West African nation from 2007 to 2018, had previously been questioned, with authorities saying he was an official suspect in the organisation of the coup attempt.
“The former president is charged with four offences, including treason, misprision of treason, and two counts of harbouring,” a statement signed by Information Minister, Chernor Bah said.
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