Nigeria, March 31 -- At least three groups of terrorists operating from Zamfara State were involved in the recent abduction of more than 130 students in Kuriga, Chikun Local Government Area of Kaduna State, two intelligence sources and a security expert told PREMIUM TIMES.

The students regained freedom last Sunday, two weeks after their abduction. The school authority earlier estimated their figures to be 287, but the state governor, Uba Sani, later contradicted them, insisting the students kidnapped were 137. A teacher was also kidnapped but died in the custody of the terrorists.

The abduction was orchestrated by Yellow Janbros, one of the top commanders of the late Ali Kachala, who analysts said had no prior experience in mass abducti...