Mr. Speaker, CSIS, the RCMP, and CBSA pay very close attention to anyone who poses a threat to the security of Canada. We work closely with our allies in the Five Eyes and the G7. Surveillance and investigations are tight and thorough. When evidence is actually available, charges are laid, and a range of other legal measures are also available under the Criminal Code and the CSIS Act. As the director of CSIS indicated before a parliamentary committee some months ago, the number of returnees known to the Government of Canada is in the order of 60, and they are under very careful investigation.
In the House of Commons on November 20th, 2017. See this statement in context.