Residents stand near a smouldering remains of a bus targeted in a suicide attack in the northeast Nigerian town of Potiskum, on February 24th, 2015. Photograph: AMINU ABUBAKAR/AFP/Getty Images

Suicide bombers struck two bus stations in different parts of northern Nigeria on Tuesday, killing at least 26 people in attacks president Goodluck Jo(...)

A young girl with explosives strapped to her killed five people and wounded dozens at a security checkpoint outside a market in the northeast Nigerian(...)

A group of Nigerian vigilantes, which comprises traditional hunters, patrol in North East Nigeria to assist the Nigerian military in fighting against Boko Haram Islamic militants. Photograph: EPA/STR

Boko Haram militants attacked an island on Niger’s side of Lake Chad but the army repelled them after heavy fighting, residents and security sources s(...)

A  woman carrying goods in the Cameroonian border town of Fotokol. Nigerian Boko Haram fighters went on the rampage in the border town of Fotokol on February 4th, massacring dozens of civilians. Photograph: Getty Images

Boko Haram militants fleeing a Nigerian army offensive killed 21 people on Friday in attacks near the northern village of Chibok, close to where the r(...)

A Boko Haram anti-aircraft gun seized by the Nigerian military at Monguno. A Nigerian border village has been bombed with at least 30 civilians dead, following a week of gains against the Islamist group by the  military forces.    Photograph:  Nigerian military handouts/AFP/Getty Images

An estimated 30 civilians were killed when an unidentified airplane dropped a bomb on a Nigerian border village, military sources based nearby in Nige(...)

Chadian soldiers participate in the opening ceremony of Flintlock 2015, an exercise organised by the US military in Ndjamena. The manoeuvres unfold as Chad and four neighbouring states prepare a taskforce to take on Boko Haram. Photograph:  Reuters

Nigerian soldiers backed by air strike s recaptured two towns from Boko Haram on Monday as US and regional troops began war games in neighbouring Chad(...)

File photograph of Nigerian police. Nigerian officials report that a female suicide bomber has attacked a crowded bus station in the northeast Nigerian city of Damaturu, killing 10 people and wounding 30.  File photograph: Afolabi Sotunde/Reuters

A female suicide bomber has attacked a crowded bus station in the northeast Nigerian city of Damaturu, killing 10 people and wounding 30, Nigerian p(...)

File photograph of Nigerian soldiers. The Nigerian army has defended the city of Gombe from an attack by Boko Haram militants. Photograph: Afolabi Sotunde/Reuters

Nigeria’s military has defended the city of Gombe in the northeast of the country from an attack by Boko Haram militants.A group of militants assaulte(...)

Chadian soldiers patrolling in the Nigerian border town of Gamboru after taking control of the city on February 4th, 2015. Photograph: Stephane YasstephaneYAS/AFP/Getty Images

Boko Haram fighters attacked a village in Chad on Friday, the first known lethal attack in that country by the Nigerian militant group, which killed s(...)

A Boko Haram flag. The group is suspected of being behind the disappearance of a minibus after an attack on  a village in north Cameroon. File photograph: Stephane Yas/AFP/Getty Images

Boko Haram militants attacked a border village in northern Cameroon and are suspected of kidnapping at least 18 people travelling on a bus, two milita(...)