Returnees queue to board buses during an evacuation of Nigerians displaced by Boko Haram militants, at the camp for displaced people in Geidam, Yobe state. Photograph: Afolabi Sotunde/Reuters

A gunman opened fire on students after walking into a high school in Potiskum in northeast Nigeria, critically injuring six, witnesses and a humanitar(...)

Children rescued from Boko Haram in Sambisa forest wash their hands at the Malkohi camp for Internally Displaced People in Yola in Nigeria. Photograph: Afolabi Sotunde/Reuters 1:39

Boko Haram fighters killed older boys and men in front of their families before taking women and children into the forest where many died of hunger(...)

A girl holds a candle during a vigil for the girls who were abducted from a secondary school in Chibok, on the anniversary of their abduction in Abuja April 14, 2015. Photograph: Afolabi Sotunde/Reuters

More than 200 schoolgirls abducted from their school dormitories by Boko Haram militants last year are not among the nearly 300 girls and women rescue(...)

A file screengrab taken on May 12, 2014, from a video of Nigerian Islamist extremist group Boko Haram obtained by AFP shows girls, wearing the full-length hijab and praying in an undisclosed rural location. Photograph: AFP/Getty Images  1:41

Boko Haram Islamic militants have kidnapped at least 2,000 girls and women since the start of last year, turning them into cooks, sex slaves and fight(...)

Nigerians protest on the one   year anniversary of the kidnapping of hundreds of Nigerian school girls in Chibok, Abuja, Nigeria on Tuesday. Photograph: EPA 1:41

Nigeria’s president-elect Muhammadu Buhari vowed on Tuesday to make every effort to free more than 200 schoolgirls abducted by Boko Haram militants a (...)

A woman casts her ballot at a polling station in Lagos during presidential elections on Sunday. Photograph:  AFP/Getty Images

Confusion and violence blighted Nigeria’s tensest presidential election since the end of army rule, with the opposition rejecting results from a turbu(...)

Rival candidates in the Nigerian presidental election, President Goodluck Jonathan (left) and Muhammadu Buhari exchange a signed peace deal in Abuja on Thursday. About 800 people died in post-election violence in 2011 in which Mr Jonathan defeated Mr Buhari. Photograph: EPA/STR

Nigeria’s president Goodluck Jonathan warned against violence ahead of Saturday’s presidential election as people stockpiled food, cash and fuel for f(...)

Nigerian military on patrol in an area reclaimed from Boko Haram. Officials say the Islamist group kidnapped hundreds of civilians while retreating from Damasak in the northeast of Nigeria. Photograph: EPA/STR

Hundreds of civilians, including many children, have been kidnapped by Boko Haram extremists who are using them as human shields in Nigeria, officials(...)

A girl stands in front of soldiers from Niger and Chad in the recently retaken town of Damasak in Nigeria. Soldiers  who liberated the  town  from Boko Haram militants have discovered the bodies of at least 70 people. Photograph: Emmanuel Braun/Reuters

Boko Haram militants have kidnapped more than 400 women and children from the northern Nigerian town of Damasak which was freed this month by troops f(...)

A Nigerian soldier covers his face at a mass grave in the recently retaken town of Damasak, Nigeria, March 20th, 2015. Photograph: Reuters/Emmanuel Braun

Soldiers from Niger and Chad who liberated the Nigerian town of Damasak from Boko Haram militants have discovered the bodies of at least 70 people (...)