The residents of the Casale San Nicole district, a northern suburb of Rome, and villagers of Quito protested on Friday against the ever-growing flow of immigrants and set mattresses ablaze to stop the housing of migrants.
Authorities in the village of Quito plan to accommodate 101 immigrants in empty apartments, but several residents broke into one of the buildings, removed camp beds, mattresses and televisions intended for the newcomers and set them on fire outside.
The protesters then put up tents, with the Corriere della Sera newspaper quoting them as saying: "We aren't going home until they leave -- this is an invasion."
Italy is currently hosting more than 80,000 migrants who have crossed the Mediterranean fleeing war, persecution or poverty in the Middle East and Africa. The arrivals include many Africans, particularly Eritreans, as well as Syrians.
Luca Zaia, the president of Italy's northern Veneto region and a member of the anti-immigrant Northern League party, told Italian television he agreed with the protesters, and complained about the "Africanisation" of his own region.
"This is a declaration of war for those who don't understand what it means to put (migrants) alongside families with young children," he said.
But Treviso prefect Maria Augusta Marrosu said: "They are staying, because they don't have the choice."
Graffiti sprayed on the side of a building in Quinto said in large red letters: "Prefect Marrosu, take them home."
A near-simultaneous protest in Casale San Nicola, a well-heeled suburb north of Rome, saw police face off against a a hundred locals protesting the arrival of some 20 migrants.
The protesters, who included members of a extreme-right group, shouted "You can't bring them here" and "We are afraid for our daughters" as several women formed a human chain to try block the migrants' bus.
Clashes erupted between the demonstrators and police, who escorted the migrants into a former school that has been turned into a reception centre. Two demonstrators were arrested over the incident, in which 14 officers were slightly injured, the police said.
Rome authorities condemned the protests and noted the location of the centre was carefully chosen in accordance with the law.
Italy's resources are being severely stretched by the influx of migrants. The interior ministry wants to share the burden across regions, but in many cases local governments do not have adequate facilities to host them, particularly in the north.
Lombardy, Italy's richest region, is hosting nine percent of the migrants, while Veneto is hosting four percent and Liguria two percent. All three regions are in the country's north.
Sicily is currently accommodating 22 percent of the arrivals, according to official figures released in June.
Previously the Hungarian government started to build a fence which is meant to stem the unprecedented flow of migrants on the country's southern border with Serbia on Monday earlier this week.