The national coordinator's committee secretary, Yassin Ekdah, said that an estimated 40 children under the age of ten have been taken to join violent extremist groups, either by their mother or both parents.
"That is a low estimate. I could imagine that there are many, many more," Ekdah said.
'New alarm: There are at least 40 Swedish children in IS (Daesh),' Aftonbladet reported.
The national coordinator also believes that some single women have traveled to Iraq and Syria and consequently had children with Daesh fighters. It is unknown how many such children there are, but they will automatically receive Swedish citizenship.
Ekdah said that some children have now returned to Sweden after living in Daesh-controlled territory for up to two years.
"They see killing as part of everyday life, they experience the fallout from bombs and are taught that killing people for having a different faith is justified. There are also cases where mothers have been victims of rape when the child is present."
"It is apparent in their play, it is often morbid and deals with death and beheadings. They have a lot of nightmares, anxiety, fear and above all a lot of aggression."