The result of the election was rejected by the main opposition candidate, and questioned by international partners including the United States and the European Union.
Gunmen on November 26 attacked military barracks, a prison and other locations in Sierra Leone, freeing about 2,200 inmates and killing more than 20 people.
The government said later that it was a foiled coup led mostly by Koroma’s bodyguards. They summoned the ex-president for questioning at the start of December.
West Africa leaders recognise Niger’s junta, but sanctions to stay
West Africa leaders recognise Niger’s junta, but sanctions to stay
The former president condemned the attacks in a statement shortly after they happened.
Koroma’s charges, which also include misprision of treason and two counts of harbouring, were read out on Wednesday while he stood in the dock and some of his supporters cried in the courtroom .
“A dangerous precedent has been set… We are dragging a former head of state – democratically elected – on trumped up charges under a political vendetta,” Koroma’s lawyer, Joseph Kamara, said.
A high court later on Wednesday granted bail to the former president, who is currently restricted at his home in the capital. The case was adjourned until January 17.
According to Sierra Leone’s penal code, a person found guilty of treason could face imprisonment for life.
A letter from West Africa’s main regional bloc, ECOWAS, dated Tuesday and seen by Reuters, said Nigeria had offered to host Koroma on a temporary basis, and that the former president had accepted the offer.
Sierra Leone’s foreign minister, Timothy Kabba, told Reuters the government had received the letter, which he said did not accurately reflect the meeting President Bio has recently held with an ECOWAS delegation in Freetown.
Kabba said the government will “not countenance” the proposal to relocate Koroma.
Twelve other people also have been charged with treason in connection with the failed coup, including ex-police and correctional officers and a member of Koromoa’s security detail, the government said on Tuesday.
There is growing concern about democracy in West Africa following a slew of coups in recent years. In 2023, armies staged coups in Niger and Gabon.
Guinea, which borders Sierra Leone, and its neighbours Mali and Burkina Faso are also ruled by military leaders who promise a return to democracy in the medium term, though this has yet to materialise.
Additional reporting by Bloomberg