Last week, RCMP investigators searched the homes of the four CEGEP Collège de Maisonneuve students who left to join ISIS in January 2015, Radio-Canada has learned.
The RCMP confiscated computers and cell phones.
The father of one of the students told Radio-Canada that he was surprised by the search but allowed the RCMP to conduct their investigation.
He said he hopes the timing shows that the RCMP are making progress in their investigation, and he hopes that will lead to finding and arresting the people who radicalized his son.
The man said he is still in regular contact with his son, who has told him he is continuing his medical studies in Syria.
Sources have told Radio-Canada that all of the parents whose children are believed to have fled to Syria have had contact with them.
The RCMP have not commented on the investigation.