The accused include Sajid, Muhammad Aslam Hunjra, Irfan and ring leader Nadeem Iqbal.
Meanwhile, a committee formed by Punjab Chief Minister, has started an inquiry. SSP Range Crimes Sheikhupura Altaf Gondal visited Hafizabad and recorded the statements of affected women.
The city police raided a house in Rawat, Rawalpindi, and arrested Wajid, a close relative of Sajid of DHQ Hospital Hafizabad, who had allegedly purchased the reported bone-marrow/ fluid/blood etc.
The police have registered three more cases against the accused under Anti-Terrorist Act and other sections of the PPC.
DPO Dr Sardar Ghias Gul told the media that a polygraph test of the ring leader and hospital employee Sajid had been conducted and samples of the affected women were being sent to the Punjab Forensic Laboratory Lahore.