Italian sources said an investigation into the facts was under way. Foreign Minister Antonio Tajani told Italian media that Hezbollah might be responsible for the attack.
Israel eyes phased 60-day IDF withdrawal from Lebanon under US-backed ceasefire, with UNIFIL oversight and strict terms.
As US envoy Amos Hochstein works to broker a deal for northern Israel's security, UNIFIL's role in Lebanon faces scrutiny after decades of failing to curb Hezbollah's activities.
Hezbollah has been launching rockets just miles from Israel’s northern border and has shown a willingness to target UNIFIL bases.
Last week Italy had said an unexploded artillery shell hit the base of UNIFIL base, putting the blame on the IDF.
According to the IDF assessment, the rockets were fired from the area of Deir Aames, one of many fired by Hezbollah in a barrage launched at Israel at 09:50 this morning.
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UNIFIL called the incident "yet another stark reminder" of the dangers that its peacekeepers face in Lebanon.
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The Italian statement said Gideon Sa'ar had "guaranteed an immediate investigation" into the shell incident.