The extremists have defied the claims by President Muhammadu Buhari's administration that the insurgency has been crushed.
Nigeria's war against two jihadist groups has left more than 30,000 people dead and displaced millions more.
Kidnappings are rampant in Nigeria,where both locals and foreigners are targeted — mostly for ransom.
Romance scams are increasing,say Australian experts. Nigerian scammers use pre-written playbooks - similar to those used by telemarketing centres - to convince victims to send money.
Hundreds of people were gathered at the site,wailing as motionless children were removed from the rubble and spirited by ambulance to a nearby hospital.
President Muhammadu Buharihad urged voters in Africa's biggest economy to give him another chance to tackle gaping corruption,insecurity and an economy limping back from a rare recession.
As the Nigerian election nears - the delay,and the uncertainty around the event,brings to mind an encounter with a would-be leader from years ago.
The Independent National Electoral Commission (INEC) announced a week's delay to voting in the early hours of last Saturday,just as some of Nigeria's 72.8 million eligible voters were preparing to go to polling stations.
Officials said the delay was needed to hold free and fair elections.
The decision by President Muhammadu Buhari sent Africa's most populous country into a constitutional crisis
When Nigerian soldiers opened fire on rock-throwing protesters,officials defended them,saying their forces had simply done what US President Donald Trump told American soldiers to do.