Iran accused Canada on Saturday of "hostile behavior" under Israeli and British influence after Ottawa cut diplomatic relations, and it raised the prospect of swift retaliation.
Canada said on Friday that it was closing its embassy in Tehran and gave Iranian diplomats five days to leave the country, branding the Islamic Republic as the "most significant threat to global peace and security."
Ottawa cited Iran's disputed nuclear work, which Western states see as a disguised effort to develop atomic bombs, its hostility toward Israel and alleged military aid to Syrian President Bashar Assad, who is battling a popular uprising.