Konservative politician Naser Khader revealed in an interview on Thursday that one of his relatives has travelled to Syria and joined Islamic State (IS).
"It happened quickly," Khader said on Radio24syv. "I have known her since she was little. I know her parents, and they are not religious. I would call them secular."
Khader said that he started to become concerned when the teenager began to take extreme positions during Facebook debates.
"At one point she said she was ashamed to be in the same family as me because I'm so critical of Islamic State," he said.