Researchers say they have identified the Facebook page of the Abu Sayyaf militant who beheaded two Canadians in the southern Philippines in 2016, and it has deepened the mystery about him.

Former Calgarian Robert Hall and fellow Canadian John Ridsdel were kidnapped in the middle of the night by extremists in the Philippines. The pair was held captive for months then ruthlessly murdered.

What will the story of the two young said-to-be-Canadian women discovered in the Mosul tunnel turn out to be?

Dear Mr. Prime Minister, Do you remember the names Robert Hall and John Ridsdel?

The deaths of Canadians Robert Hall and John Ridsdel at the hands of the militant group Abu Sayyaf in the Philippines earlier this year were 2016's biggest regret for Prime Minister Justin Trudeau.

A Norwegian man freed by militants after a year of jungle captivity in the southern Philippines described the ordeal Sunday as "devastating."

Philippine troops on Saturday dug up what they believe is the body of Canadian hostage Robert Hall, who was beheaded by Abu Sayyaf extremists more than two weeks ago.

Abu Sayyaf extremists on Friday freed a Filipino woman who was with two Canadian hostages beheaded by the militants in the southern Philippines after failing to get a huge ransom, officials said.

Friends are describing Robert Hall as a man who lived life to the fullest, loved adventure but also gave back to his community.

Trudeau called terrorism "a scourge on the world," and said all of Canada is mourning with Hall's family.