Canada on Thursday imposed its first-ever sanctions on what the foreign ministry called "extremist" Israeli settlers in the West Bank, and said Ottawa was weighing additional measures to deter settler violence against Palestinians. Canada's sanctions, which follow similar measures by allies including the United States and Britain, target four individuals accused of engaging directly or indirectly in violence against Palestinians and their property. The sanctions prohibit dealings related to the individuals and render them inadmissible to Canada, the foreign ministry said in a statement.