Senior U.S. counterterrorism officials say they are "mindful of and thinking about" the possibility that Hezbollah could reach out beyond Israel and attack Israeli -- and even Jewish -- interests around the world.
And should things become desperate, attacks against the United States and its interests could also be possible.
Two officials pointed to how in 1992 and 1994, Hezbollah operatives attacked first the Israeli embassy and then a Jewish community center in Buenos Aires, killing 114 people. Believed responsible were Hezbollah operatives living north of Buenos Aires in the so-called tri-border region where Argentina, Brazil and Paraguay come together.
They also noted that Saudi Hezbollah operatives were responsible for the 1995 Khobar Towers bombing in Saudi. In that attack, 19 U.S. airmen were killed.
One official said that Hezbollah does have both "supporters and financial help" inside the United States. The official pointed to several convictions for cigarette smuggling over the years in North Carolina and Missouri as examples of Hezbollah activities. In those cases, Hezbollah was named as the ultimate recipient of some of the smuggling profits.
While there is no threat at this time and Hezbollah has made "a conscious strategic decision" in recent years not to attack the United States, it is possible that they could carry out attacks against U.S. interests. More likely than not, said the official, such attacks would be carried out against U.S. overseas interests.
"They have worldwide capabilities," said another official. "This is not just a terrorist group. It is a political infrastructure."
What could drive the Hezbollah to carry out such attacks? "A direct U.S. attack would certainly do it", said the first official but also a belief that the United States was helping Israel in their attacks on Hezbollah.
Similarly, said the second official, a sense of desperation could trigger attacks "and if things get worse over there, you have to consider that as an option for them."