JERUSALEM, Israel -- Security forces in Singapore thwarted a potential terror attack against Israeli Defense Minister Ehud Barak, the Kuwaiti al-Jarida daily reported Thursday.

Barak, who was in Singapore to attend an international aviation exhibit, left for Japan on Wednesday.

According to the report, the Mossad (Israel's secret service) provided a heads-up on three Iranian nationals, working with Hezbollah, who had accessed Barak's itinerary in Singapore and planned a possible assassination.

Security personnel in Singapore took the three men into custody before the defense minister arrived.

US on Alert for Hezbollah Attack

Meanwhile, America is closely monitoring Hezbollah, the Iranian-backed terror group, following attacks earlier this week against Israeli diplomats in India, Georgia, and Thailand.

Wednesday, Rep. Peter King, R-N.Y., raised concerns with Homeland Security Secretary Janet Napolitano that the group might launch an attack in the U.S.

"We have just this past week had a very large conference call with leaders of the Jewish community around the country, and we remain in constant touch with them," Napolitano said.

"Right now we have no specific threat against any organization in the United States but this is certainly a situation that bears watching," she added.

The U.S. Department of Defense estimates that Hezbollah receives between $100 and $200 million annually from Iran.