The extremists seized a first batch of schoolgirls in Nigeria's restive northeast three weeks ago, saying they were holding them as "slaves" and threatening to sell them, and have since kidnapped other girls in the area.
"A special team with all our resources in the region is at the disposal of Nigeria to help in the search and recovery of these young girls," French Foreign Minister Laurent Fabius told parliament.
"The president gave the defence minister and myself the order... To put our (intelligence) services at the disposal of Nigeria and neighbouring countries," Fabius said.
Described as "heartbreaking" and "outrageous" by US President Barack Obama on yesterday, the kidnappings have drawn several pledges of help from the international community.
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Washington has deployed military experts to Nigeria to help search for the girls and Britain has offered unspecified practical help.
His comments came as Boko Haram this week kidnapped another 11 girls from a village in Borno state, the epicentre of the group's five-year Islamist uprising.
And today, witnesses and a local senator said the extremist group had staged a bloody attack in the northeastern town of Gamboru Ngala, firing on fleeing civilians and killing hundreds.