Prime Minister Benjamin Netanyahu on Tuesday indicated that Israel has prevented hijacked airplanes from crashing into European cities.

“We have, through our intelligence services, provided information that has stopped several dozen major terrorist attacks, many of them in European countries,” he told foreign diplomats in Jerusalem.

“Some of these could have been mass attacks, of the worst kind that you have experienced on the soil of Europe and even worse, because they involve civil aviation. Israel has prevented that, and thereby helped save many European lives,” Netanyahu said, apparently referring to plane hijackings.

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He did not provide specific details about the attacks Israel helped prevent. The Prime Minister’s Office declined to elaborate.

At a meeting of Israel-based ambassadors to the North Atlantic Treaty Organization (NATO), Netanyahu said Jerusalem contributes to the security of every single member of the Western defense alliance, in that it fights both Sunni and Shiite strands of radical Islam.

Besides fighting Islamic State terrorism aimed at European cities, Israel is also preventing the group from creating a second stronghold in Egypt, he said.

“ISIS is being destroyed in Iraq and Syria, but it is trying to establish an alternative territorial base in the Sinai. Israel is contributing to preventing that in myriad ways,” Netanyahu said. “In general, I would say that Israel is the most powerful indigenous force in the Middle East that fights radical Islam.”

Israel further helps NATO by fighting Iran, the dominant Shiite power, the prime minister went on. The Jewish state does not only seek to prevent the Islamic Republic from acquiring nuclear weapons, it is also “absolutely committed to preventing Iran from establishing a military base in Syria. And we back our words with action,” he added, likely hinting at various airstrikes on weapon convoys and factories allegedly carried out by Israel.

Furthermore, Iran plans to import 100,000 Shiite fighters to Syria as part of its quest to dominate and eventually “conquer” the Middle East, he charged.

If Tehran were successful in its efforts, radical Sunni and Shiite forces would clash in Syria, sending millions of refugees to European shores, the prime minister warned.

“Where will the spillover [of a Sunni-Shiite clash in Syria] happen? In Europe. Where will the human flow go? To Europe. Who’s preventing that right now? Israel? Right now, Israel alone. But I maintain that it’s a common interest that we have,” he told the NATO ambassadors during the public part of the event.

Israel and NATO have cooperated on security matters for decades but recently upgraded their ties significantly. Last year, Israel opened its first office at NATO headquarters in Brussels.

Israeli officials have repeatedly said that the Jewish state opposes the presence of Iran and its proxies, notably Hezbollah, in southern Syria and Lebanon.

Israel has been negotiating with the United States and Russia, the main brokers in Syria, to keep Iran-backed Shiite militias and the Hezbollah terrorist group away from the border.

Netanyahu, Defense Minister Avigdor Liberman and others have all said that Israel’s policy is to target shipments of advanced weaponry, including accurate long-range missiles, that are heading to or in the possession of Hezbollah.

In late December, Assad’s troops, accompanied by Iranian-backed fighters, recaptured the Syrian Golan from rebels, allowing President Bashar Assad to reassert control over a small portion of the area adjacent to the Israeli border. Still, much of the area along the border, around the city of Quneitra, remains under rebel control.

Last week, IDF Chief of Staff Gadi Eisenkot said the most serious immediate threat to Israel was posed by Hezbollah, followed by other jihadist groups supported by Tehran positioned on the Syrian border.

Describing Iran as a “multidimensional threat,” the army chief said the most worrying aspect is the Islamic Republic’s desire to obtain nuclear capabilities, followed by its efforts to achieve hegemony in the region.