The authorities that seized control in the west African country in 2021 has "have cracked down on the opposition, media, and peaceful dissent, and have failed to keep their promises to restore civilian rule by December 2024," the global group (HRW) said in a statement.

It said it based its report on interviews with victims of abuse and nearly 60 national and international organisations, including opposition and media groups.

Junta leader Mamady Doumbouya overthrew his predecessor Alpha Conde in a coup in September 2021.

"His government has largely carried on where Conde left off, killing, intimidating, and silencing critics, and torturing and disappearing those suspected of working with the political opposition," said Ilaria Allegrozzi, senior Sahel researcher at HRW.

Security forces have crushed demonstrations with excessive force in a crackdown that has led to the deaths of dozens of protesters, the report said.

Authorities have closed down independent media and "disappeared and allegedly tortured two prominent political activists", Fonike Mengue and Mamadou Billo Bah, it added.

Up to 59 people, including at least five children, have died during protests since June 2022, HRW said, citing Guinean civil and rights groups.