The timing with this and the Boston Marathon is a eyebrow raiser, but I would think after the Boston attacks, the Canadian police figured it was time to finally go in and get the group they had been monitoring.
Alleged terror plot thwarted by arrests in Ontario, Quebec - Politics - CBC NewsOriginally Posted by CBC
There will be a news conference held in less than a hour by the RCMP about this event.
As scary as this can be, it is nice to know that the vast majority of the time, the officials do get it right and catch these guys.
Edit: Updated the thread title to reflect what was said at the news conference, in that this was an al Qaeda supported plot.