The teacher told Italian state TV he was conducting a social experiment. Italian Education Minister Marco Bussetti condemned the incident in a public school in Foligno, a town in the Umbria region, as "very grave." Bussetti tweeted Thursday that urgent measures would be taken to address it.
Immigration to predominantly white Italy is a relatively recent phenomenon. The anti-migrant League, one of the two parties in government, issues statements associating foreigners with crime.