"The arrests were made during a joint operation by the Special Task Force and Detective Department of the Kolkata Police," city police sources said.
"While Pawan Agarwal was arrested from a flat at Baguiati area near the city, Aditya Damani and Raj Sharma were arrested from Burrabazar area," they said.
Damani and Sharma were together arrested for one racket, while Agarwal was associated with another.
The police seized one laptop and four mobile phones from Agarwal and three laptops, six cellphones and Rs 77,000 in cash from Damani and Sharma, the sources said.