BBC News, Abuja
The Nigerian military says nearly 6,000 Boko Haram members including commanders, fighters and their families have surrendered to the authorities in the last couple of weeks.
Cameroon had also announced the surrender of hundreds of Boko Haram militants in the country recently.
In Nigeria, the mass surrender of the members of the militant group is a result of the intense military offensive in the north-east of the country, the army says.
The death of Boko Haram leader Abubakar Shekau in May could be another reason.
Many of his followers have either surrendered to the authorities or switched their loyalty to rival group Islamic State West Africa Province (Iswap).
The Nigerian authorities say they’re now profiling those who have surrendered for possible de-radicalisation and rehabilitation.
But some Nigerians are sceptical about reintegrating the former fighters back into the society - citing possible risks.
According to the UN the insurgency by Boko Haram that began in 2009 has caused the death of more than 300,000 people and the displacement of millions of others in Nigeria and several other countries in the Lake Chad region.
The information minister says Nigeria is winning the war against insecurity and is negotiating with Twitter over the ban.
A young Nigerian woman who was among a group of more than 200 teenagers abducted in the eastern town of Chibok seven years ago has escaped her kidnappers.
Hassana Adamu was freed a week after another of the victims escaped and was reunited with her parents.
Ms Adamu, and her two small children, presented themselves to the Nigerian military in the northern state of Borno.
On Saturday they met visiting Borno Governor Babagana Zulum, who shared the news on his Facebook page, including photos of the young family.
The mass abduction of the schoolgirls in 2014 by Islamist Boko Haram militants led to an international outcry.
While many of the victims eventually escaped or were rescued, more than 100 are still missing.
Read more on the Chibok kidnappings:
BBC NewsCopyright: BBC
Fifty former Boko Haram fighters have surrendered to the authorities in Cameroon in the town of Mora, Far North province.
This means that over the past two months at least 183 ex-fighters from the militant group have laid down their arms in Cameroon.
The director of the regional demobilisation and reintegration centre in Far North, Oumar Bichair, told the BBC he was receiving more and more Boko Haram ex-combatants.
The group was founded in north-east Nigeria more than a decade ago but it expanded its deadly attacks to other countries in the region.
The wave of surrenders in Cameroon comes after news of the death in May of Boko Haram leader Abubakar Shekau.
He reportedly killed himself during an assault by a rival militant faction.
By Aliyu Tanko
BBC Hausa editor
BBC News, Abuja
The Nigerian army has released more than 1,000 people who have been cleared of having links with the Islamist militant group Boko Haram.
They were reportedly being held at a military facility in the north-eastern city of Maiduguri in Borno state.
Army spokesman Onyema Nwachukwu said the 1,009 suspects had undergone a "rigorous" profiling process before being cleared and handed over to the civilian authorities for release.
It is not clear how long they have spent in military detention.
In a recent report, the UN said the decade-long Islamist insurgency in north-eastern Nigeria had caused the deaths of nearly 350,000 people.
Kidnappings in the north-west of Nigeria has shaken a country already struggling to contain militants in the north and separatists in the south.
Africa editor, BBC World Service
A new United Nations report estimates that the 12-year conflict in north-east Nigeria has contributed to the deaths of nearly 350,000 people - more than 90% of whom are children.
The UN Development Programme says that for every person killed directly in the fighting, at least nine other lives are lost because of the impact of the war.
Since the Islamist group Boko Haram launched its first attacks in 2009, close to two million people have fled their homes in the three states of north-east Nigeria.
Agricultural production has been hit hard, leading to disease and hunger.
Facilities including health centres and schools have been destroyed or become inaccessible.
BBC News, Lagos
A video from the Nigerian Islamist group Boko Haram has been published, confirming the death of its leader, Abubakar Shekau.
Last month, a rival faction claimed Shekau had been killed during a confrontation with its fighters.
The Nigerian authorities have not commented on the claims.
This video adds to the growing evidence that Shekau really is dead this time.
In the three-minute clip seen by the BBC, a man dressed in white clothes with a black turban reads from a piece of paper in Arabic.
He’s flanked by dozens of fighters with rifles and ammunition, standing in what appears to be a rural area.
Boko Haram’s black flag is also visible.
The man speaking is said to be Boko Haram commander Bakura Modu, also known as Sahalaba.
Security analysts believe he may be the group’s new leader.
Many had hoped that Shekau's death would lead to a cessation of hostilities between Boko Haram and the splinter Islamic State West Africa Province.
This video suggests that has not been the case.
Shekau led Boko Haram for more than 10 years and was best known for kidnapping over 200 schoolgirls in Chibok, north-eastern Nigeria, in 2014.
Since its creation in 2009, Boko Haram has waged an insurgency in north-eastern Nigeria, and carried out attacks in neighbouring Chad, Niger and Cameroon.
In Nigeria, the violence has displaced over two million people and caused at least 30,000 deaths.
BBC News, Abuja
The Nigerian Army says it is investigating reports that Boko Haram leader Abubakar Shekau has either died or was seriously injured during a clash with a splinter group, the Islamic State in West African Province (Iswap).
It’s not the first time Shekau has been reported killed. But the militant leader resurfaced each time.
Army spokesman Brig Gen Mohammed Yerima told the BBC that the army was still looking into what may have happened, but will not issue a statement until it gets definite proof.
One journalist with close links to security agencies has said that Shekau died when Iswap attacked Boko Haram positions in the Sambisa forest, north-east Nigeria.
The AFP news agency quotes two sources saying that Shekau survived his attempt to kill himself when he was surrounded.
Iswap has not commented.
Shekau took over Boko Haram after its founder Muhammad Yusuf was killed by police in 2009.
Since then, more than 40,000 people have been killed and over two million displaced from their homes in the deadly insurgency in north-east Nigeria.
By Ishaq Khalid
BBC News, Abuja
Stacey Dooley meets young women who were sent on suicide bombing missions by Boko Haram, one of the world's deadliest terrorist groups, but survived to tell the tale.
The office of President Buhari has also alleged that some religious and past political leaders are plotting to throw the country into a tailspin.
BBC News, AbujaCopyright: BBC
Suspected Boko Haram militants have attacked a humanitarian hub in north-east Nigeria's Borno State.
The jihadists ransacked the police headquarters in the town of Damasak as well as schools, shops and homes.
Eyewitnesses say the insurgents struck on Tuesday evening, firing heavy mortars and detonating explosives. The attack came as Muslims were preparing to break their fast on the first day of Ramadan.
The number of casualties is not yet known. There are also reports that jihadist flags were raised in the town.
Security sources say the Nigerian military responded by killing many insurgents, but it has not been possible to independently verify this.
Last Saturday, at least four people including two soldiers were killed during an attack on the same community. This prompted the UN to suspend humanitarian activities in the area.
BBC News, Abuja
The United Nations is launching a $1bn (£721m) appeal in the Nigerian capital, Abuja, to help millions of people in need of humanitarian aid in the north of the country.
The Islamist militant group Boko Haram has been carrying out attacks in the region for the past 11 years. More than 30,000 people have died and millions have been displaced in that time.
The UN says, despite the scaling up of humanitarian assistance since 2016, the situation remains dire.
It estimates that nearly nine million severely vulnerable people in the area need aid.
The international response plan this year is targeting 6.5 million people in the worst affected states of Borno, Yobe and Adamawa.
The UN and the Nigerian authorities say the impact of the Covid-19 pandemic has made the humanitarian crisis even worse.