The police official heading the investigation team took suspect Muhammad Waseem, Qandeel’s brother, to Lahore to conduct the tests in a forensic lab on Friday, Dawn online reported.
The result of the polygraph test is expected on Monday, while that of DNA may take some days.
On Wednesday, police obtained a five-day physical remand of Waseem who had confessed to strangling Qandeel to death, before the judicial magistrate on Tuesday.
Meanwhile, acting SP, Investigation, Ali Mardan said police would interrogate cleric Mufti Abdul Qavi regarding the case next week.
He said police investigation so far suggested that Aslam Shaheen, another brother of Qandeel who was initially nominated in the FIR by the family, was not involved in the case.