Canadian authorities are looking for at least four teenagers who may have flown to Turkey in a bid to join ISIS, a police source told CNN -- the latest in a string of such defections by Westerners lured to the Middle East fight for the Islamist group. Two of the four teenagers are women from Laval, Quebec, while at least one is a male from Montreal, the Canadian Broadcasting Corp. reported. he teenagers reportedly flew from Montreal to Turkey in mid-January. Two days later, family members alerted the police. It's unclear where the teens are now. Three of them attended a Montreal community college that has now suspended its lease arrangement with an Islamic group after finding evidence of what administrators described as "hate speech" involving one of the group's leaders, according to a school official. One of the students took two class sessions offered by the organization, its representative, Adil Charkaoui, told reporters. He described the teenager as quiet and "very shy." "We didn't evaluate him, so really we don't know about his level in religion and in Arabic," said Charkaoui, who denied any links to radical Islam. Canadian authorities say they are looking at the possibility that other youths may have followed a similar path, but they won't say how many. Friends of one of the teenagers identified her as 18-year-old Shayma Senouci, describing her as smart, kind and "normal" -- not one to talk religion. RCMP declined to comment when asked to confirm that Senouci is among those believed to be in the Middle East.