Chad and Niger declare state of emergency in areas attacked by Islamist rebels.
Military presence reduced in Niger Delta as Buhari rumoured to be in London for secret talk with militants.
At least 30 soldiers were killed in deadliest attack since April 2015.
Security expert tells IBTimes UK salafi jihadism has spread all across Africa.
EXCLUSIVE: Recorded phone conversation with UK-based station reveals NDA threats to Muhammadu Buhari.
Military offensive continues in oil-rich Niger Delta as oil pipelines attacks halt oil production.
Nigerian president vowed to address grievances but insisted army crackdown would continue.
Group condemns perceived marginalisation in Niger Delta and demands greater shares of oil revenues.
Buhari promised he would end corruption and terrorism and revitalise crippled economy.
Militants urged oil company not to carry out repair works at platform previously attacked.
Care for All movement aims to show scale of Boko Haram's insurgency goes well beyond Chibok kidnapping.
Khadija Ibrahim said there was another female in the car, roughly 15-year-old, who also seemed drugged.
Diocese of Abuja of the Church of Nigeria urges groups behind recent attacks to cease violent activities.
The Islamist terror group's senior commander says it is willing to end hostilities.
The former game reserve in northeastern Nigeria is now a stronghold of Islamic extremist group.
In all, 97 women and children held captive by Boko Haram were rescued while 35 jihadists were killed.
Amina Ali was rescued more than two years after being kidnapped by Boko Haram from Chibok village.
Egbesu Mightier Fraternity affiliated with newly established Niger Delta Avengers militant group.
Amina Ali Darsha Nkeki and her baby were found near the Sambisa Forest in northern Nigeria.
Amina Nkek is believed to be one of the 276 schoolgirls abducted from Chibok village in April 2014.
DNA data will help government locate criminals and terrorists such as Boko Haram.
The UK has pledged funds during a Regional Security Summit in Abuja .