Ali Saqr al-Qasem, 20, shot his mother, Leena al-Qasem, in the head with an assault rifle in front of a large crowd that gathered to witness the crime. Twitter/Raqqa is Being Slaughtered Silently

In a freak incident, an Islamic State jihadist has executed his own mother in public in Raqqa, Syria after she tried to persuade him to quit ISIS. According to reports, Ali Saqr al-Qasem, 20, shot his mother Leena al-Qasem in the head with an assault rifle in front of a large crowd that gathered to witness the crime.

The Syrian Observatory for Human Rights, which monitors the war in Syria from London, reported that the act took place on Wednesday. The website reports that Leena, who was in her late forties, lived in the town of Tabqa, near the Islamic State of Iraq and the Levant's capital Raqqa. She was employed in a post office in the city, which became the spot where the execution reportedly took place.

She expressed her desire to leave ISIS and asked her son to do the same. However, her son reported her to the ISIS, who in turn arrested her and later found her guilty of apostasy or renunciation of a religious faith.

"She was executed under the pretext of 'inciting her son to leave the Islamic state and escaping together to the outside of Raqqa, and that the Coalition will kill all members of the organisation,” the Observatory reports. It is not clear at the moment if Ali was forcefully given the task of executing his own mother or if he chose to do it on his own will.

According to the activist group Raqqa is Being Slaughtered Silently, Lina was 35. CNN writes that it has not been able to confirm the news through its own sources.

ISIS has gained a reputation as an extremist group by carrying out staged killings such as public executions, beheadings, mass shootings and burnings on camera then posting videos of them on social media. No footage of the incident has surfaced yet.