Muhammadu Buhari

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.

Decision to scale back army presence follows threats by new militants as oil production plummets.

Nigerian leader has cancelled three official trips in a month.

JNDLF vow missile attack after Avengers blow oil pipelines as renewed violence rocks Niger Delta.

Pipeline attacks continue in restive south-eastern Nigeria as oil production decreases.

UN says operation could be a wide-ranging, long term exercise that could last over several decades.

Reasons behind last-minute cancellation not yet clear, as violence in oil-rich Niger Delta continues.

Military offensive continues in oil-rich Niger Delta as oil pipelines attacks halt oil production.

Violence erupts during events commemorating millions of victims of 1967-1970 Biafran war.

Nigerian president vowed to address grievances but insisted army crackdown would continue.

The Republic of Biafra was established on 30 May 1967, triggering a war that caused the death of millions.

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.

Abuja Appeal Court upholds decision to deny bail amid fears Kanu could flee Nigeria due to dual citizenship.

Care for All movement aims to show scale of Boko Haram's insurgency goes well beyond Chibok kidnapping.

Diocese of Abuja of the Church of Nigeria urges groups behind recent attacks to cease violent activities.

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.

IBTimes UK interviews pro-Biafran activist arrested in London for trying to confront President Buhari.

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.

Unions called for action after government increased petrol prices by two-thirds to help tackle fuel shortage.

Anger as Nigeria scraps petrol subsidies by increasing prices to curb ongoing fuel shortage.

Newly established group demands end of perceived marginalisation in oil-rich Niger Delta region.

Unequal treatment of white collar corruption is approaching developing world standards.

Calls for nationwide strikes sparked in Nigeria as petrol prices increased by two-thirds.

The UK has pledged funds during a Regional Security Summit in Abuja .