KARACHI: Pakistan Telecommunication Authority (PTA) in its ongoing efforts to control grey trafficking unearthed another illegal gateway exchange in Hyderabad on Wednesday. A successful raid against the grey operators was carried out along with FIA team at 18 Faraz Villas, Phase 3, Qasimabad, Hyderabad. During the raid, an illegal exchange comprising 11 illegal gateways, three Laptops, 1 desktop PC, two PTCL modem, two Evos, 7x Switches, 2x Router Boards andhundreds of SIMs were confiscated. Three persons were arrested by FIA. Further search was under way to arrest more accused.