Tip about Toronto ISIS plot came from France

French authorities alerted CSIS to the threat of an ISIS terror attack in Toronto after becoming aware of the alleged plot in the buildup to the Paris Olympics.

The investigation that resulted in the arrests of two Toronto men accused of plotting an attack for ISIS began with a tip from France, sources have told Global News.

French authorities allegedly became aware of at least one of the suspects and notified Canada’s intelligence service.

Following a brief investigation, the Canadian Security Intelligence Service called in the RCMP, which conducted its own probe and arrested the father and son on July 28.

The suspects were “in the advanced stages of planning a serious, violent attack in Toronto” when they were taken into custody at a hotel room north of the city, the RCMP said.

Ahmed Fouad Mostafa Eldidi, 62, and Mostafa Eldidi, 26, have been charged with terrorism, possession of weapons and conspiracy to commit murder for the so-called Islamic State.

None of the allegations have been proven in court.

But the case has raised questions about immigration security screening, since the father was also charged with an ISIS-related aggravated assault that allegedly occurred abroad in 2015.

Sources have claimed the charge stemmed from the mistreatment of a prisoner before he immigrated to Canada. The incident allegedly involved a 2015 video showing a man dismembering a prisoner with a sword, the sources said.