Amid threats to the safety of Saudi teenager Rahaf Mohammed, who is granted asylum in Canada, the Toronto agency helping her has hired a security guard to ensure "she is never alone" as she starts a normal life, its executive director says.

An 18-year-old Saudi woman, who fled her family saying she feared for her life, arrives in Toronto's international airport after being granted asylum in Canada, where Foreign Minister Chrystia Freeland welcomes her as a brave new Canadian.