The Federal Investigation Agency (FIA) has arrested another 50 foreign nationals in Islamabad as part of its crackdown on illegal call centres.

The FIA said that the foreigners were found hiding in a plaza at a private housing society, and were later shifted to lockup.

Earlier, 250 foreign nationals were sent to Adiala and Attock jails. In the first phase of deportations, 50 Vietnamese nationals were also been deported.

Meanwhile, the National Cyber Crime Investigation Agency (NCCIA) detained dozens of foreign nationals in three separate operations carried out in Islamabad between August 13 and 21.

The detainees were being investigated over allegations of online fraud and blackmail, targeting people living abroad and producing sexual content.

Reports said that the investigation being conducted by the FIA, NCCIA and Islamabad Police has also been extended to the Pakistan Telecommunication Authority (PTA), Federal Board of Revenue (FBR) and Securities and Exchange Commission of Pakistan (SECP).

Authorities have decided to place 671 foreign nationals arrested for allegedly operating illegal call centres on the foreign blacklist while the Foreign Office (FO) is also in the process of informing the relevant countries about the alleged offences involving their nationals.