Hezbollah official Sheikh Muhammad Ali Hammadi reportedly died of his wounds after unknown gunmen opened fire on him, killing him instantly, Al-Akhbar, a Hezbollah-affiliated news source, reported on Tuesday.
He was shot outside his home in the Bekaa Valley. At this time, it is unclear who shot Hammadi, Israeli media reported.
An-Nahar reported that the assassination was not political in nature and was instead motivated by a four-year-old family feud.
Security forces have begun an investigation to determine the circumstances, an Al-Manar TV correspondent said.
FBI's most wanted
Hammadi may be the same Muhammad Hamamdi, who is on the FBI's most-wanted list following his hijacking of a West German plane in 1985, during which an American service member was tortured to death.
Hamamdi was reportedly killed in a strike in Pakistan, according to Pakistani intelligence, but this was never confirmed, and the FBI kept him on the list following the strike.
Hamamdi is wanted for over a dozen crimes, including hostage taking, air piracy resulting in murder, and placing explosives aboard an aircraft.