The gang, led by one Nazar, entered a banian checking centre at Kasipalayam in the town last night, in the guise of police personnel, saying there was a complaint that the centre was involved in the commercial sex business, police said.
After interrogating the owner, the gang took away Rs 3,000 in cash, two cell phones and a camera and also asked a 19-year-old girl, working there, to accompany them for further interrogation.
Police traced the call, arrested the gang and freed the girl in the early hours of today, they said.