African forces launch ground and aerial attacks after Islamists pledge allegiance to Isis.
Maiduguri city hit by series of bombings over four hours in busy public locations.
At least 10 people were killed when a suicide bomber set off an explosion outside a crowded market in Maiduguri.
An angry crowd beat to death a young girl and then set her body on fire, according to police and eye witnesses.
Nigeria's president Goodluck Jonathan's visit was overshadowed by three bombings that left at least 35 dead.
Amnesty International's annual report State of the World's Human Rights makes for grim reading.
Boko Haram will be major suspects having recently used young girls as suicide bombers
21 dead after Boko Haram attack on village near Lake Chad.
Nigerian military launches air strikes in north-east state ahead of March elections which face threats from Islamists.
Abubakar Shekau, said the group would target the country's election process scheduled for 28 March.
Cameroon's troops launch operation against Boko Haram militants in Waza region near border with Nigeria.
Nigerian currency has fallen 7% so far this month and nearly 20 since currency devaluation in November.
Nigeria's military joined forces with two air force jets to attack Boko Haram rebels in Gombe on Saturday.
Militants arrived on motorised canoes and attacked the village of Ngouboua.
Around 30 militants attacked the village of Ngouboua on the shores of Lake Chad overnight.
A huge explosion rocked the Niger town of Diffa on Monday, which has been previously attacked by Islamist militant group Boko Haram.
Nigeria postpones presidential elections by six weeks after top security officials warn against inadequate security measures.
Many accuse Nigeria's government of doing little to protect civilians from Boko Haram attacks
Threat from militant group and voter ID distribution mean Nigeria may not be ready for election.
Civilians reportedly had their throats slit in their homes and mosques, before buildings were burned.
Report shows decline of freedom and rise of terrorism in many countries in the world in 2014.
Islamist rebels launched assault on northeastern city on Sunday.