The diplomat has been identified as Glyn Berry, 59. He had been serving as the political director of the 250-member provincial reconstruction team in Kandahar.
The Canadian soldiers have been identified as Pte. William Edward Salikin of 3rd Battalion Princess Patricia's Canadian Light Infantry, Cpl. Jeffrey Bailey of 1 Combat Engineer Regiment and Master Cpl. Paul Franklin of 1 Field Ambulance, Lt.-Gen. Marc Dumais told a news conference.
Officials say two of three of the soldiers are in critical condition and are suffering life-threatening injuries.