Amnesty International documented 101 cases of detention incommunicado and torture of suspects, who were often detained with little evidence.
Buhari has been away for two months. Is his vice president, Yemi Osinbajo, preparing to succeed him?
Two of the so-called Chibok girls, abducted by Boko Haram in 2014, recently visited Trump at the White House.
Buhari has been on medical leave for a total of 14 weeks in 2017, and Nigerians are not satisfied.
In a rare interview, Fulan Nasrullah, a former member of Boko Haram, says the government is once again underestimating the insurgents.
Ethnic tensions are boiling over in Nigeria. They did that before, and more than 1 million people died as a result.
The ISIS-linked group, while holding less territory, has remained a deadly rival to the country's government.
The rights group claimed that nine senior commanders had overseen torture and abuses that led to some 8,000 deaths.
Decades of terrorism in Africa show that heavy-handedness is not the solution to a rising militant threat.
As a continent Africa already faces four droughts—working against the effects of climate change is a necessity, not an option.
The EU is investing $56 million in a counter-terrorism force in a region awash with militant groups.
Muhammadu Buhari has been out of the country for almost three months in 2017 as Nigeria battles recession and insurgency.
The girls were among the 276 abducted by Boko Haram in April 2014. More than 100 remain in the militants' hands.
Somalia's Al-Qaeda affiliate killed 4,300 people in 2016, making it Africa's biggest militant threat.
Akinwumi Adesina tells Newsweek that the U.S. must continue its support for Africa to stop militants thriving.
The Sultan of Sokoto said that the almajiri system, where children beg to fund an education in the Koran, was not part of Islam.
Officials have stolen $15 billion in federal defense funds, resulting in an army that is ill-equipped and unprepared.
Oxfam said the figures show the extreme inequality in Nigeria, Africa's second-biggest economy.
A Nigerian governor planned to shut all IDP camps in his state by June, but 1.4 million people remain displaced by the Islamist insurgency.
83 of the girls were to be released in a prisoner swap, but one said she was "happy" in Boko Haram captivity.
Boko Haram released 82 more girls, but global scrutiny and a long rehabilitation program means freedom may yet prove elusive.
Nigeria secured the release with mediation by the International Committee of the Red Cross. A military source said three Boko Haram commanders had been freed in an exchange, but declined to give further details.
The kidnapping was one of the high-profile incidents of Boko Haram's insurgency, now in its eighth year and with little sign of ending. About 220 were abducted from their school in a night-time attack.
The jihadi group has displaced more than 2 million people across northeast Nigeria and neighboring countries.