The coup de état in Congo has resulted in the army taking over facilities.

BREAKING! There is a military coup in Congo Brazaville at the moment. Congo president Nguesso is reported to be in US at the moment. He's been in power for decades. LETS GO! pic.twitter.com/IyuCZfBimj

— AfricaDigest (@africlandpost) September 17, 2023

While the country’s president, Denis Sassou Nguesso, 79, is in New York, the army is taking control of key installations in the capital, local journalistic sources say.
The media suggests that the commander of the presidential guard is leading the coup. Africa Digest reminds that President Nguesso has been in government for decades.

https://www-lajornadanet-com.translate.goog/portada/reportes-de-golpe-de-estado-en-la-republica-de-el-congo-indican-que-ejercito-se-toma-instalaciones/?_x_tr_sl=auto&_x_tr_tl=en

Seems like Thierry Moungalla, Minister of Communication and Media of the Republic of Congo, denies it.
But then, the tweet source is serious. Gotta wait for more confirmations.

URGENT – Des informations fantaisistes évoquent des événements graves qui seraient en cours à #Brazzaville. Le Gouvernement dément ces fake news. Nous rassurons l’opinion sur le calme qui règne et invitons les populations à vaquer sereinement à leurs activités. #ComGouvCg

— Thierry Moungalla (@ThMoungalla) September 17, 2023

And then I’ve read something this weekend that some of the countries which couped recently signed a miliary alliance with some more countries in the region.
But I don’t remember if Congo was one of them.

Former French colonies create military alliance
Mali, Niger, and Burkina Faso have signed a Sahel security pact

https://www.rt.com/africa/583081-mali-burkina-niger-military-pact/

h/t 16 Blocks