A video which appears to be showing Guinean President Alpha Conde surrounded by "military rebels" has emerged online.
The clip shows 83-year-old Conde sitting in a sofa while uniformed militants are asking him to confirm that he was not harmed.
The president appears to stay silent.
It's not clear at the moment if the images of the attempted coup shared online are genuine.
The Guinee News website said that the president had been detained by the country's rebel forces, led by Colonel Mamady Doumbouya, former French legionnaire.
Heavy gunfire has been reported in the Guinean capital Conakry near the presidential palace on Sunday, with at least two civilians injured during the skirmish.
Guinean authorities confirmed that rebel forced had attacked the presidential palace. However, Conde's forces have apparently repelled the attack.
Col. Doumbouya has now announced the dismissal of Guinea's government, the suspension of the country's constitution and the closure of its borders.
Guinea, a former colony of France, held a presidential election in October 2020. The vote was won by Conde, who was running for a third term following changes to constitution that had previously allowed a president to serve only two terms. The election was surrounded by protests and opposition calls for a boycott.