Police denied the allegations of torture and said Nadeem Yousuf, the dead man, was a drug addict and might have died due to his dependence on narcotics.
Yousuf, who was in his twenties, was detained in Nankana Sahib town of Punjab province about a week ago after he was accused of burning pages of the Quran.
Police official Azhar Basra told PTI that residents of Usmani Wala village handed over Yousuf to police.
He said Yousuf appeared to be