Italian police say they are searching for the sender of pig heads to Rome's main synagogue, the Israeli Embassy and a city museum hosting an exhibit on the Holocaust.
Police headquarters said Saturday the anti-terrorism squad was handling the case.
The pig heads arrived in three separate boxes, all sent by a delivery service unaware of the contents.
The deliveries were made Friday, three days before an international memorial day for Holocaust victims.
In a tweet, Rome Mayor Ignazio Marino condemned what he called intimidation of the city's Jewish community.
Local media reported Saturday that anti-Semitic graffiti also appeared outside a municipal building in a Rome neighbourhood.
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