According to radio news report (98.1 FM, who has the premier crime reporter in Québec), the police has now confirmed a 30 minutes warning call. So far, the police indicates only that the glass exterior doors were blown (much less than the hyped up report on SUN), which would tend to indicate a bomb on the outside of building.
I am with Spanky on this one: Hope its a one time deal.
However, there is a conjunction of events here: PQ and BQ kicking up a new campaign to re-kindle independence, bombing happens on Canada Day, Queen's visits (not seen as relevant in Qc) with images of the country going gaga over her, the failed (yes, failed) attempts by the Quebec gang at causing mayhem at the G20 last week-end when the police had the "audacity" to arrest them before they could go out, a large number of disaffected youth outside Montreal and Quebec city and the current general disaffection of quebecers with federal politics confirmed poll after poll. Those (with some adaptations) are the same type of circumstances that caused a small gang of youth to create the FLQ in the late 1960's, save that in the 60's you also had the "romantic" idea of the worldwide "armed class struggle for the national independence" movement (but Che is dead and we are not in a period of massive decolonization as we had after WWII).
Some may be too young to remember this but, before the kidnappings that caused the October crisis, the FLQ's weapon of choice for many years had been bombings against federal institutions: in particular, mailboxes and army recruiting centres.
So I do hope its a one shut deal, but being paranoid (But paranoid enough?) I think it should be thoroughly investigated and, as the bombing happened at a military installation, we should hope that the Provost Marshall will get involved in the SQ investigation to ensure it is done properly to cover any military concerns over this.