"In our view, ISIL [IS] must cease to have any safe haven in Syria," Mr Harper said in the House of Commons.
Canada's mission against IS will also be extended for one year, beyond October's election and well into 2016.
Opposition leaders have criticised Mr Harper for drawing Canada into a war with unclear objectives.
The move means Canada will be the first Nato country, other than the United States, to strike inside Syria. » | Tuesday, March 24, 2015