Found this revealing exclusive report by Premium Times on their site. Read below...
Nigeria’s Special Forces from the Army’s 7th Division have sighted and narrowed the search for the more than 250 abducted Chibok schoolgirls to three camps operated by the extremist Boko Haram sect north of Kukawa at the western corridors of the Lake Chad, senior military and administration officials have said.
“It has been a most difficult but heroic breakthrough,” one senior military official said in Abuja.
That claim was supported by another senior commander from the Army’s 7th Division, the military formation created to deal with the insurgency in the Northeast. The 7th Division is headquartered in Maiduguri, the Borno State capital.