Daily Mail reports that the footage is believed to have been filmed in the city of Hama. It showed a bearded cleric ranting at the woman in Arabic and accusing her adultery while she pleads for her life.
Her pleas fell on deaf ears as she was pelted with stones by a group of masked men before the man believed to be her father stepped forward with a huge rock and struck her, eventually causing her death.
The sickening 5-minute video reportedly emerged on an ISIS-affiliated social media page in the morning, however, it is not clear if the footage was actually shot and has not been independently verified.
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Daily Mail also gathered that the exact accusations against the woman remains sketchy, although the cleric who appears at the start of mobile phone-filmed clip accuses her of committing adultery.
In the video, the militant orders her to be 'content and happy' that she is about to be stoned to death because, he says, her death has been ordered by God and is therefore required under Islamic law.
Asking her is she is now willing to 'submit to God' and be stoned to death, the young woman replies 'yes', before pleading with her father to forgive her.
After initially ignoring her, the man is eventually prompted into responding by the militant.
'Don't call me father,' he tells his daughter, who responds by asking him to pray for her.
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At this point her father turns to the ISIS fighters, who help him tie a rope around her neck and drag her to a pit, where the stoning begins.
As the militants rain down rocks on the defenseless woman, her father steps forward and picks up the largest rock before using it to strike and kill his daughter.
The exact moment of her death is not caught on camera as the footage fades to black moments before her father strikes her.
ISIS militants often use stoning to murder women they accuse of committing adultery.
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