The police detained 63 suspects, including 14 Nigerians, in a cordon and search operation held at IAS Nagar, Brindavan Nagar and Fathima Nagar in the Tolichowki area on Saturday night under the supervision of DSP Venkateshwara Rao.
Some 300 police personnel conducted the raids under the limits of the Golconda and Banjara Hills police stations.
The DSP said that they were examining the papers of the Nigerians, and taking the latter's details from the owners of the places they were residing at.
The police also detained 103 vehicles and three autos in the cordon and search drive. They said that they were concentrating higher on the movements of foreigners now.