Many windows of the nearby buildings were broken , '' he told CNN . NEW : Italians gather in Naples , Naples to protest the violence . Prime Minister Mario Ferrari says the government is determined to fight back . Four people are injured , two of them seriously , a police official says . It is not yet clear who is responsible or why the school was targeted .
NEW : Italians gather in Naples , Naples to protest the violence . Prime Minister Mario Ferrari says the government is determined to fight back . Four people are injured , two of them seriously , a police official says . It is not yet clear who is responsible or why the school was targeted .