Fawzi Ayoub, a commander for the Lebanese Shiite militant group, was killed in combat in Syria last week, said security officials who spoke to The Associated Press on condition of anonymity as they weren't authorized to speak to journalists.
Ayoub, also known as Abu Abbas, was a dual Lebanese and Canadian citizen. He was wanted on charges of attempting to use a forged US passport to enter Israel.
A Twitter account by a pro-Hezbollah media arm known as Mouqawama also confirmed Ayoub's death Wednesday, posting a picture of him performing Islamic prayers, dressed in a military uniform.
The United States has declared Hezbollah a terrorist organization.
Ayoub was placed on the FBI's "Most Wanted Terrorists" list after he had been indicted by the US Attorney's Office in eastern Michigan on Aug 5, 2009. They accused him of "willfully and knowingly" using and attempting to use "a false, forged or counterfeit US passport in order to gain admittance into the state of Israel for the purpose of conducting a bombing on behalf of Hezbollah."