Trudeau confirmed today that the victim was John Ridsdel of Calgary, Alberta. He was 68 years old.
Ridsdel was one of four tourists including Canadian Robert Hall, a Norwegian man and a Filipino woman that were kidnapped last September by Abu Sayyaf militants from a marina on southern Samal Island.
The militants had threatened to kill one of the three male hostages if a large ransom was not paid by 3 pm today local time.
Trudeau says his government will work with the government of the Philippines and international partners to pursue those responsible for this "heinous act.