Nigeria's security forces failed to respond to several warnings that suspected Boko Haram extremists were on their way to a town where 110 schoolgirls were seized in a mass abduction last month, Amnesty International has said.

Two members of staff of the UN's migration agency were among 11 people killed in an attack by Boko Haram militants on a military base in north-eastern Nigeria.

Pupils are staying away from a school in northern Nigeria, where Boko Haram extremists seized 110 girls in a raid a week ago.

More than 100 girls are still missing three days after suspected Boko Haram extremists attacked their school in northern Nigeria, parents have said.

About 50 girls remain missing several days after an attack on a village in Nigeria by Boko Haram extremists.

At least 12 people have been killed and 48 others injured after a double suicide bombing at a market in Nigeria’s northern city of Maiduguri.

Another girl seized during a mass abduction from a boarding school in Nigeria nearly four years ago has been found, authorities said.

Military authorities say Nigerian soldiers have arrested more than 400 people associated with the Boko Haram extremist group hiding on the islands of Lake Chad, including fighters, wives and children.

Two female suicide bombers have attacked a market in Nigeria leaving at least 13 people dead.

Nigeria's President Muhammadu Buhari, in an address to the nation after returning from London where he spent more than three months for medical treatment, said his government will reinvigorate its campaign against the Islamic extremist insurgency in the country's northeast.

At least eight people have been killed by a female suicide bomber at a mosque in north-eastern Nigeria.

Parents of the 82 Nigerian schoolgirls released over the weekend from Boko Haram captivity are still waiting for the government to tell them when they will be able to see their daughters.

Nigerian president Muhammadu Buhari met 82 Chibok schoolgirls newly freed from Boko Haram extremists - then made a shock announcement that he was leaving immediately for medical checks in London as fears for his health continue.

The president of Nigeria is to meet with 82 Chibok schoolgirls freed this weekend after being kidnapped three years ago by Boko Haram.

Nigerian security officials say they have thwarted plans by Boko Haram members to attack the embassies of the United States and Britain.

The US sale of high-tech attack aircraft to Nigeria for its campaign against Boko Haram Islamic extremists will move forward despite concerns over abuses committed by the African nation's security forces, American officials said.

Nigeria's government must speedily negotiate the release of 195 Chibok schoolgirls kidnapped by Boko Haram extremists nearly three years ago, the Bring Back Our Girls movement said.

At least six people have been killed as four teenage girls detonated explosives worn on their bodies on the outskirts of Maiduguri city, Nigerian officials said.

More than half a million children in the west African area wracked by Boko Haram extremists are so malnourished their lives could be in danger unless they get aid, a UN humanitarian official has said.

Self-defence fighters have killed three girl suicide bombers targeting a bustling market in north-eastern Nigeria, civilian and military officials said.

Boko Haram's leader has urged his fighters to "kill, slaughter and abduct ... and detonate bombs everywhere" in a new video which denies Nigerian government claims that his Islamic extremist group has been crushed.

Nigerian officials prevented kidnapped girls freed from more than two years of captivity by Boko Haram Islamic extremists from spending Christmas at home with their families, according to a lawyer.

The Boko Haram extremist group has been driven from its last forest stronghold with fighters on the run and nowhere to hide, Nigeria's president said.

Two female suicide bombers have blown themselves up at a market in north-east Nigeria's Madagali town, killing at least 30 people and wounding 67, the army said.

Thousands of young children have died of starvation and disease in Boko Haram-ravaged north-eastern Nigeria, Doctors Without Borders said.

The Nigerian army has rescued one of the Chibok schoolgirls kidnapped by Boko Haram Islamic extremists more than two years ago in a raid on a forest hideout.

Nigeria's president has vowed to "redouble" efforts to secure the release of nearly 200 schoolgirls who remain missing more than two years after being abducted by Boko Haram extremists.

The Nigerian government is negotiating the release of another 83 of the Chibok schoolgirls taken in a mass abduction in 2014 but more than 100 others appear unwilling to return home, a community leader said.

A group of Nigerian parents have been reunited with 21 schoolgirls freed after being kidnapped by Boko Haram two and a half years ago.

A group of Nigerian parents are excitedly waiting to be reunited with 21 girls kidnapped by Boko Haram two and a half years ago, and freed in the first negotiated release organised by Nigeria's government and the Islamic extremist group.

Nigeria's president Muhammadu Buhari has invited the United Nations to help negotiations to swap the kidnapped schoolgirls from Chibok for detained leaders of Boko Haram, a government statement said.

Boko Haram leader Abubakar Shekau and other commanders of the Islamic extremist movement have been killed by an air strike, according to Nigeria's military.

Nigerian military helicopters have rushed polio vaccines to dangerous parts of the country's north east, where Boko Haram operates and where two toddlers paralysed by the virus were recently discovered, health officials said.

Boko Haram has murdered 600 teachers and displaced 19,000 in an effort to stop children getting the education they need to break the cycle of poverty, writes AnneMarie McCarthy       

Abubakar Shekau has said he still leads Boko Haram, exposing the biggest rift yet among Nigeria's Islamic insurgents and possibly paving the way for a break from Islamic State (IS).

The Nigerian military has rescued 80 children and women held captive by the Boko Haram extremist group in a remote village.

The first kidnapped schoolgirl to escape from Islamic extremist group Boko Haram’s stronghold in the Sambisa Forest has been flown to Nigeria’s capital, Abuja, to meet the country’s president.

The first of more than 200 schoolgirls missing for over two years after they were kidnapped by Boko Haram militants in Chibok in northeast Nigeria has been found, a parents group and local officials said.

One of the girls kidnapped by Boko Haram from a boarding school in the Nigerian town of Chibok more than two years ago has been found, according to a relative.

The multinational forces fighting Boko Haram have arrested five leaders of the extremist group and freed dozens of women and children held captive, Cameroon's government said.

A video has surfaced which appears to show some of Nigeria's kidnapped Chibok girls who have not been heard from since the mass abduction by the Islamic extremist group Boko Haram two years ago.

Two female suicide bombers have killed at least 24 worshippers and wounded 23 others in an attack during dawn prayers at a mosque on the outskirts of the Nigerian city of Maiduguri.