According to the UN, 3,600 children are believed to have been detained between January 2013 and March 2019
The fighters stormed into Balumri village, killed four male residents and abducted two others
The attack on Friday night in the border district of Gueskerou, is the latest to hit the Diffa region near Lake Chad.
The twin blasts tore through a crowd late Tuesday in the town of Mafa, some 50 kilometres from regional capital Maiduguri
Witness says 23 people were killed as they returned from the funeral and "the remaining 42 were killed when they pursued the terrorists".
Dalori camp and the neighbouring village have been repeatedly targeted in Boko Haram attacks by heavily armed fighters
The three-vehicle convoy was returning to Damasak from Layi village when the gunmen opened fire
Security sources said the seven Chadian soldiers and the guard were killed in an ambush on Friday in Mbomouga in Chad's Ngouboua area
Assailants, arriving on nine armoured trucks, stormed into the military base outside the town of Gajiram.
"This is another terribly sad day for civilians in northeast Nigeria and for the humanitarians who are working to help them"