Pakistani authorities have barred the family of a murdered social media celebrity from legally "forgiving" their son for strangling her, sources said, in a rare stand against the so-called practice of honor killings.

Muhammad Waseem drugged and strangled Qandeel Baloch on Friday in a murder that has shocked Pakistan, a deeply conservative Muslim nation where the 26-year-old both titillated and outraged with her risque social media photos and videos.

Waseem told media he had "no regrets" about killing his sister as she violated the family's honor by her social media pictures, including "selfie" photographs with prominent Muslim cleric Abdul Qavi. In a video post with Qavi, she appears to sit on his lap.