Ahmed Muthana refused to rule out that his son was among the killers, telling the Daily Mail : “‘I cannot be certain but it looks like my son. He must fear Allah now for killing people. How can he expect to face Allah if he is killing human beings?”
Asked if he would forgive his son if he returned home to Cardiff, the 57-year-old added: ‘No, he must be mentally ill – either that or there is something else not right.’
The aspiring medical student, 20, came to the attention of the world in June when he appeared in a propaganda video by the Islamic State of Iraq and al-Sham [Isis] urging others to join him.
A month later he apparently warned that Britain should be afraid of the skills that he had learned in Syria.
A Twitter account believed to belong to Muthana showed an image of a stack improvised explosive devices in a garage.
Alongside it is the stark warning: “So the UK is afraid I come back with the skills I’ve gained.”
In the latest video the man believed to be Muthana stands to the right of “Jihadi John”, who is dressed in black with a balaclava while the rest of the militants wear army fatigues.