Kind of hints at it. From the TO Star:
We want to find out why this United Nations post was attacked and also why it remained manned during what is now, more or less, a war during obvious danger to these individuals.
Well, for one thing, the post was in constant touch with the IDF and was assured on several occasions that the shelling would stop.
Harper also thinks the attack was not deliberate:
I certainly doubt that to be the case, given that the government of Israel has been co-operating with us in our evacuation efforts, in our efforts to move Canadian citizens out of Lebanon and also trying to keep our own troops that are on the ground involved in the evacuation out of harm's way.
At least he's said something. I thought he was hiding in the same hole as Iggy.