Young Britons Nasser Muthana, 20, Abdul Raqib Amin and Reyaad Khan, also 20, appeared in a video by Isis encouraging British Muslims to go and fight in Iraq.
The father of Nasser Muthan, Ahmed, believes his other son, 17-year-old Aseel, is also in the Middle East and said they were both “brainwashed” in the UK.
Paraic O’Brien asked al-Arifi, speaking from Saudi Arabia, whether he had met the Muthana brothers, but he said he could not remember doing so.
When asked what he thought about Isis, he said: “What I have read on the internet is not good.”
He added: “I would say to all the young people in Britain – don’t go to Syria.”