Pakistan's police said Shahbaz Taseer was kidnapped Aug. 26 in Lahore.
Taseer, the son of a Pakistani politician assassinated in January for criticizing the country's blasphemy law, and his family have continued to receive threats from extremists.
Meanwhile, Islamabad police chief Bani Amin said an Islamic militant group named Tehreek-e-Taliban Pakistan engineered the assassination of Shahbaz Bhatti, federal minister for religious minorities.
Bhatti, a Roman Catholic, had pleaded for mercy for a Christian woman sentenced to death on charges of blaspheming Islam.
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