The recent attack on a school in Dapchi in which five girls lost their lives is just the latest indication that there are few safe spaces left for children in the northeast.
The agency said it had documented more than 1,000 verified cases, the first time it had published an estimated tally.
"Since 2013, more than 1,000 children have been abducted by Boko Haram in northeastern Nigeria, including 276 girls taken from their secondary school in the town of Chibok in 2014", said UNICEF in a statement. But the actual number could be much larger, it added. The Boko Haram conflict -which has led to the death of at least 2,295 teachers, with more than 1,400 schools destroyed- is in its tenth year with there being no sign it is likely to end anytime soon.
Since the insurgency of the terrorist group escalated after a 2009 crackdown by the military, Boko Haram, chiefly under Abubakar Shekau'sleadership, has been responsible for the death of over 20,000 people and the displacement of more than 2.5 million scattered across Internally Displaced Person (IDP) camps across the country and its neighbours.
Nigerian soldiers hold up a Boko Haram flag that they had seized in the recently retaken town of Damasak March 18, 2015. Nearly all of the captured girls were later released after about month following negotiations with the federal government. It said she was forced to marry one of the fighters, locked in a room and repeatedly raped.
The government said the release was a prelude to ceasefire talks, though some insurgency experts disagree.
It is expedient to bring to public awareness, that in its desperation to survive troops' onslaught and remain relevant in the eyes of the public, the Boko Haram terrorists group has continued to make frantic efforts to infiltrate communities with Person Borne Improvised Explosive Devices (Suicide bombers) to callously unleash terror and fear on the populace.
On Monday, Buhari said he plans to seek re-election in 2019.
Four years since the Chibok abduction, about 100 of the schoolgirls are unaccounted for.