Italy’s security agencies are focused on averting any risk of copy-cat attacks, the sources said.

“I do not think it is the necessary to raise alarms,” Interior Minister Matteo Piantedosi stressed on Thursday.

“Attention was already at the highest level and we have raised it further,” he continued.

“There are thousands of sites that are already under surveillance.”

On Thursday, Defence Minister Guido Crosetto said it is right for Italy to tell Israeli Prime Minister Benjamin Netanyahu he is wrong in killing thousands of innocent Palestinians and creating the conditions for Hamas to garner more support.

“I think it is right to tell Israel today that what is happening risks damaging Israel itself,” said Crosetto, speaking via video link from Rome to the seminar titled Geopolitics of resources: raw materials and technological sovereignty, a global challenge.

The seminar was part of the Trento Economics Festival organised by the 24 Ore Group and Trentino Marketing.

“The fact that this war is leading to the killing of thousands of innocent people is creating the conditions for Hamas to find even more consensus,” he continued.

“It is right for a friendly nation to say that Netanyahu is wrong, we must secure Palestine and give Palestine a future.”

Meanwhile, a shop in the centre of Milan put up a sign in Hebrew declaring ‘Israelis and Zionists are not welcome here’, according to a social media post by Roberto Della Rocca.

Rocca is a member of the Israeli-Italian Chamber of Commerce.

“A sign saying ‘stop war’ with a rocket with the Israeli flag and a rocket in the opposite direction with the Palestinian flag is OK. I could put it there too,” Della Rocca wrote.

“But a sign in Hebrew to be inconspicuous is something else,” he added, saying this the result of “bad faith ... of an anti-Semitic nature”.

ANSA