The unidentified sources said that Iran supplied the militants in Lebanon with missiles that can be used to attack Israel should the Israeli government decide to take action against Iran for its nuclear program, Haaretz reported Friday.
Haartez cited London's Al-Quds al-Arabi report that attributed the information to unnamed "senior Arab sources."
The sources added that the advanced weaponry was what Hezbollah Secretary-General Hassan Nasrallah referred to in recent statements when speaking of the militant group's newest arms.
News of the missiles allegedly in Hezbollah hands comes after media reports claimed the Shiite group was attempting to stockpile weaponry.
Haaretz said Israel has maintained its policy that any potential missile systems operating in Lebanon would be seen as an aggressive action that could prompt an Israeli response.