Arrests in Toronto, Montreal thwart major terroist plot: CBC

RCMP continue to investigate the cause of the fatal crash. (CBC)

Canadian police and intelligence services have made arrests in Toronto and Montreal on Monday in what reports are saying was the thwarting of a major terrorist attack planned on Canadian soil.

CBC News reports that the arrests by the RCMP and CSIS anti-terrorism units disrupted a major attack. Suspects were arrested in Ontario and Quebec on Monday.

National Affairs reporter Greg Weston reports that the arrests were part of a cross-border investigation with U.S. authorities.

There has not be an official confirmation on what the alleged plot entails, but Weston reports that it is not connected to last week's bombing in Boston.

The plot is also not believed to be connected to a group of friends from London, Ont., who have been connected to a recent attack on an Alergian gas refinery.

The RCMP is expected to hold a press conference at 3:30 p.m.

A statement from RCMP reads:

Today, the Royal Canadian Mounted Police will provide details on a National Security criminal investigation coordinated by RCMP-led Integrated National Security Enforcement Teams (INSETs) in Montreal and Toronto.

More as this story develops.