ISIS suspects known as 'high-risk travellers,' Edmonton police say

Three Edmonton men believed to have been killed while fighting for ISIS had beenidentified by police as high-risk travellers before the trio left the city in 2013.

Although police knew the men had gone overseas, they were unaware of their apparent deaths until learning of CBC News reports Wednesday, said Deputy Chief Brian Simpson.

CBC reported that Mahad Hirsi and his two cousins Hamsa and HersiKariye were killed while fighting for ISIS, according to AhmedHirsi,the father of Mahad. A fourth cousin from Minnesota is also believed to have been killed.

Simpson said Edmonton police werenot specifically investigating the trio.

"EPS, like other services across the country, work through the RCMP, who has a national mandate for any terrorist or extremist activities," he said. "We worked with the RCMP."

Simpson saidthecases are among a growingnumber police have been investigating over the past year and a half.

"Ayear and a half ago, it would have been a rare thing," he said. "Theres a lot more today."

Son radicalized in city, father says

Ahmed Hirsibelieves his son Mahad, 20,was radicalized in Edmonton.

• 3 ISIS recruits from Edmonton believed killed

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• Radicalized youth in Edmonton worries police chief

In 2010, Mahad moved from Toronto to live with his aunt in Edmonton, where he finished high school andbegan working and regularly attendinga mosque.

Hirsi saidit was during that time that Mahad became devout.

Some people, I dont know who he is, they make him brainwash and they change his mind, he said.

Mahadeventually moved in with his cousins, Hamsa and Hersi Kariye, who also lived in Edmonton.

Hirsi believes they left together to go overseas in October 2013, buthe didnt even know his son had left the country at that time. He found out when Mahad called his brother from overseas.

Soon after, Hirsi said,policeappeared on his doorstep andshowed him a picture of his son. They said he was in Syria and asked if he had a Twitter account.

Hirsi begged police to bring his son home. He believed that even if his sonended up in a Canadian jail, atleast he would still be alive.

Then, last October, someone phoned the mother of two of the cousins to tell her the three men had died, as well as a fourth cousin from Minnesota.

One family member insists the men did not go overseas to join ISIS.HamsaandHersiKariyesbrothersaid the cousins went to Egypt to study their religion.