The four, all in their twenties, would offer a free drop to unsuspecting techies in their cabs, which were attached to some travel agencies.They would then take their victims to secluded places and rob them, police said.
Police have recovered some weapons, a car and two-wheeler from the group.
Their interrogation has led to arrest of three more persons in other cases, sources added
Published 17 June 2011, 08:49 IST