Editor’s Note: This story was updated to clarify the number of Canadians who have travelled abroad to join extremist groups.
In parliament, Trudeau pledged to prosecute those who broke Canada’s anti-terrorism laws by joining the ISIS group, but also said his government would try to reintegrate them into society.
“We recognize the return of even one individual (who joined the ISIS group) may have serious national security implications,” Trudeau said.
WATCH: Opposition question consequences for ISIS fighters returning to Canada
“We are going to monitor them. We are also there to help them to let go of that terrorist ideology,” he added.
Nearly 180 Canadians are known to have travelled overseas to join extremist groups. About 60 have returned to Canada, according to government figures released in 2016.
LISTEN: Newstalk 770’s Rob Breakenridge connects with Mubin Shaikh, Ex-CSIS and RCMP undercover counter terrorism expert.