Nigeria's former first lady has accused the Buhari administration of overseeing a "witch hunt" against her and her husband.
On Friday, the Nigerian military called a pro-Biafra group "terrorists." By Monday, it had changed its tune.
The Indigenous People of Biafra is calling for a separate state in southeast Nigeria, raising fears of another civil war.
The country's vice president slammed health tourism just days after Buhari returned from a three-month medical break in the U.K.
Buhari has been on medical leave for a total of 14 weeks in 2017, and Nigerians are not satisfied.
The ISIS-linked group, while holding less territory, has remained a deadly rival to the country's government.
Yemi Osinbajo took the reins as acting president during Buhari's absence for medical treatment in Britain.
The president said he would need to undergo "follow-ups" in the coming weeks.
Foreign companies will have to make their U.K. property portfolios public.
Olusegun Obasanjo said that the idea of Biafra separating from Nigeria is "dead."
Buhari was speaking, for the first time since the May elections, at a 'presidential media chat' with journalists
The government has said it cannot guarantee all attacks will stop by the New Year.
Militants attack Muslims in Kano
A bomb blast has gone off in a mobile phone market in Kano
Nigeria aims to vanquish the Islamist group by December, prompting an uptick in violence in neighboring countries
Can Nigeria's President Muhammadu Buhari fulfill his pledge to defeat the deadly Islamist group by the end of the year?
There is no indication any of the hostages were the Chibok schoolgirls kidnapped last year.
Buhari has consistently said he would not appoint the corrupt to his cabinet or his staff. Are his standards too high?
U.S. officials have said they are willing to send military trainers to help Nigeria counter a six-year-old northern insurgency by the Boko Haram Islamist movement.
The incoming president is to launch probe into corruption claims of former governor of Central Bank.
Chad and Niger military leaders pledge to fight "side by side" with Nigerian army against Boko Haram.
"President Jonathan was a worthy opponent and I extend the hand of fellowship to him," said Buhari.
The terror group has been forced out of all but three areas days ahead of delayed vote.
The government has been forced to pay oil marketers $158 million in order to re-start fuel deliveries.
Speaking in London, Muhammadu Buhari says "no inch" of territory will be in hands of terror group if elected.
Olusegun Obasanjo expresses concern president is "going for broke" to hold on to power.