Imphal, Aug. 24 -- Security forces apprehended four activists from different underground groups during a series of operations conducted at vulnerable locations across the valley districts in Manipur on Saturday.

Four mobile phones, demand letters from various underground groups, and Aadhaar cards were recovered from them.

The Manipur police reported on Sunday that the arrestees were involved in extortion targeting educational institutes, owners of brick fields, stone crushers, spas, shops, and the general public in the valley areas.

They were also accused of abduction for ransom, mediating disputes related to crimes against women, and recovering loan money through intimidation and threats.

During the first operation on Saturday, secur...