Just over a month after the Paris massacre, ISIS has urged its supporters in France to kill school teachers who provide a secular education.

The call appeared in the latest French-language edition of the terror organization's magazine Dar al-Islam, which was published yesterday.

"ISIS claimed that the teachers take Muslim children away from their parents as part of a Western war against the Muslim family as well as prevent them from "joining the Caliphate," reports Debka File.

"It is therefore an obligation to fight and kill…these enemies of Allah," the magazine said.

ISIS' call for its supporters to attack teachers came on the same day that America's two biggest school systems – Los Angeles and New York – received threats "of a large-scale jihadi attack with guns and bombs."

L.A. responded by shutting down its entire school network, but New York Mayor Bill de Blasio claimed the emailed threat was "outlandish" and contained "nothing credible".