The Syrian al-Qaeda and former al-Nusra operative who reportedly sent his two young daughters on a suicide bombing mission was killed in the Syrian capital of Damascus on Dec. 25.
Reports indicate Abu Nimr al-Suri, who is also known as Abdurrahman Shadad, was killed by a terrorist organization that was also once part of the Al-Nusra Front, the International Business Times reports.
"Sources confirmed that [terrorist group Jabhat Fateh al-Sham] assassinated him, after he was working under its protection," said the Syrian Observatory for Human Rights.
It is not clear why the group wounded and killed one of its own.
The SOHR had also previously condemned al-Suri for leading his daughter to death on Dec. 16.
"We in the Syrian Observatory for Human Rights condemn this crime against the Syrian girl Fatima and her sister, and condemn this act which result was nothing but the death of a child in her early life, and deprived her of her basic right to live," they said.
Al-Suri sent his 10-year-old girl to blow herself up at a Damascus police station shortly after an address he gave with his daughters -- the oldest being age 10 -- in a film.
"You want to surrender so that you're raped and killed by the infidels?" he said. "You want to kill them, no? We're a glorious religion, not a religion of humiliation, isn't that so darling?"
"You are not going to be afraid because you are going to the Heavens, right?" he later added in question to one of the girls, who responded, "Yes", the Daily Mail reports.
In the video, their mother is also seen encouraging her daughters to engage in the suicide bombing mission.
"No-one is young when it comes to jihad as every Muslim is supposed to participate in jihad," the woman said after the cameraman asked why she was sending such young daughters to perform the deadly mission.
Al-Suri's background appears deeply entrenched in terrorist groups and activities.
In addition to working with al-Qaeda, al-Suri reportedly worked with the Islamic State group, also known as ISIS.
Only two years ago in 2014, al-Suri's brother and his wife had also blown themselves up in a suicide bombing mission.