Nelson Chamisa, who came second in elections last year, says his party has been "hijacked".
At least 43 people were killed in ethnic and religious violence in Plateau state, residents tell the BBC.
Top footballer Senzo Meyiwa was killed on the orders of singer Kelly Khumalo, a South African court hears.
Some say the comments are insensitive after 2,200 died of starvation and related illnesses in 2022.
The presidency scotches rumours that there is a plan to relocate the capital from Abuja.
The six have been sentenced to death by hanging for their involvement in a 2021 coup plot.
The government is assessing the value of the mineral reserves, which have been found in six counties.
Months after South Africa's deadliest fire, families are living in shacks with no power or water.
Morocco beat Zambia to do Africa Cup of Nations hosts Ivory Coast a major favour, sending the Elephants into the last 16 by the back door.
Treasures taken 150 years ago will go back, the BBC can reveal, in a possible model for other disputes.
DR Congo reach the last 16 at the 2023 Africa Cup of Nations after a goalless draw with Tanzania which eliminates the East Africans.
Morocco manager Walid Regragui is suspended for four games by the Confederation of African Football following incidents after their draw with DR Congo.
Namibia book a first ever appearance in the last 16 of the African Cup of Nations by holding a Mali side who top Group E with the point.
South Africa reach the last 16 at the 2023 Africa Cup of Nations with a draw against Tunisia which eliminates the 2004 champions.
Algeria part company with coach Djamel Belmadi after a second straight Afcon group-stage exit, just five years after winning the title.
At least 40 artisanal miners were killed when a tunnel collapsed, officials say.
A medical check-up revealed that Hage Geingob, 82, had "cancerous cells", his office said last week.
Hosts Ivory Coast sack coach Jean-Louis Gasset midway through the Africa Cup of Nations despite having slim hopes of reaching the last 16.
A curfew is imposed after a row over cattle leaves eight dead during ethnic and religious clashes.
A fertility breakthrough offers hope for saving the northern white rhino from extinction.
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