...in Guinea
The events a bit blurry, not sure the actual sequence, but...
On Sunday (Sept 5th), news appeared of a military rebellion east of Conakry, the capital of Guinea, Kaloum - the part of town where the presidential palace and most of the ministries are located - was sealed off. Heavy gunfire could be heard.
On state tv, colonel Mamadi Doumbouya appeared, the leader of the special forces and he addressed the nation in his speech. He told the viewers, it's time to unite, end the government mismanagement, the poverty and the corruption; he said as a soldier it's their duty to save the country, and they'll no longer entrust it to one man but to the people. The whole appearance gave the impression of a putsch.
Apparently they arrested President Alpha Conde, promised to change the politics, and introduced nationwide curfew. Today they lifted the curfew in mining areas, but barred the officials from leaving the country.
As of now other branches of the army are silent.

Conde was elected in 2010 as President during the first democratic election of the country, then re-elected in 2015. Originally a two-term limit was in effect, but in March last year, they changed the constitution that a president can serve three terms. Then in October Conde was re-elected the third time.
Since then protests were going on, the demonstrators clashed with security forces, dozens died, hundreds were arrested, opposition leaders as well.
Guinea isn't in a bad situation economically. She's rich in iron ore, gold, diamond, and has the world's largest reserves of bauxite. This ensured economic growth but as usual in African countries, the wealth does not trickle down, poverty and corruption goes hand in hand.