The Assam Rifles has arrested five cadres of the NSCN-IM and rescued six people kidnapped by members of the insurgent outfit in Nagaland's Dimapur district, an official said.

The six people, including a headmaster of a school, were kidnapped by NSCN-IM insurgents between April 13 and April 27, and kept at a house in Bamanpukhri area, with ransom being demanded from family members, he said.