More on the UN observation post.

"The prime minister also says he wants to know why the post was still manned by UN observers even though it was in the middle of an obvious war zone.

UN Secretary General Kofi Annan has suggested Israel deliberately targeted the UN outpost.

But Harper says the facts suggest otherwise.

"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 our of harm's way," he said.

"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."