A British man claims he spotted his son carrying out an execution in an Islamic State group propaganda video. The man said the boy's mother, Sally Jones, 47, fled to Syria to join the militant group also known as ISIS in 2013 and has been raising their son as a terrorist.

The propaganda video showed five children executing Kurdish soldiers in Syria’s Raqqa province. The other children are reportedly from Egypt, Kurdistan, Tunisia and Uzbekistan, SITE Intelligence reported Friday. The nine-minute long video shows the children in military uniforms targeting the five kneeling hostages identified as "atheist Kurds" and "spies."

The remarks from the British father, who was not named, were widely covered by the British press. He said he had not seen his son, JoJo, in three years. He said Jones "brainwashed" his "normal boy."

"He was brilliant, just a normal boy – always chasing bugs, going down the park. I have had to block it out. It’s been hard, we just have to carry on. It’s disgusting he’s been brainwashed," the father told reporters.

The boy was born in 2004 and moved to Syria when he was 10 years old. He is now known as Abu Abdullah al-Britani, while Jones allegedly uses the pseudonym Umm Hussain al-Britani and is known as the "jihadi bride" in British tabloids. 

Jones and her son reportedly converted to Islam and are avid followers of ISIS. Her story has captivated the British press in part because she and her son are pale Brits with blue eyes, while ISIS is often associated with people of Middle East or Arab descent. 

Jones warned followers on Twitter in May about potential terrorist attacks in London. "To be honest I wouldn’t go into Central London through June... or even July well to be honest I wouldn’t go there at all especially by Tube," she tweeted.