According to the Canadian Government report on the terrorist threat to Canada, at least 60 "extremist travelers" who have returned to Canada after leaving to join what it refers to as "terrorist groups", are planning attacks at home.
The Free Beacon condenses some of the highlights of the report, which is linked above, and published the following:
The Canadian government is warning its citizens that it knows of at least 180 people who have traveled abroad to join terror groups and is tracking another 60 “extremist travelers who had returned to Canada,” according to a new government report that provides further evidence of the Islamic State’s migration to North America.
Terrorists returning to Canada after fighting abroad in hotspots such as Syria “raise serious security concerns,” says the report, which warns that “a violent act of terrorism could occur in Canada.”
Canadian authorities, like those in the United States, have continued to monitor a number of Western individuals who have traveled abroad to join terror groups. A number of these individuals have made their way back to North America, raising concerns that ISIS and its affiliates are planning attacks on the continent.
Canada’s finding is similar to warnings by some current and former U.S. officials, who have said that ISIS affiliates are already living in America and other Western countries.