The seven were arrested from the Dhomdoma area in the Nalbari district and had been handed over to the Guwahati police for interrogation, district Superintendent of Police Jitmol Doley said.
A K Agarwala, an official of the National Hydro Power Corporation, who was abducted by militants, was rescued by the Assam Police following an operation inside a thickly forested hilly area near Assam-Arunachal Pradesh boundary late Monday night.