Israeli airstrikes in Lebanon have killed at least seven high-ranking Hezbollah commanders and officials in recent weeks, including leader Hassan Nasrallah, who was assassinated in a strike on his underground headquarters in Beirut on Friday.

Iran faces a complex dilemma over whether to attack Israel directly or use its string of proxy armies — as weakened as some of those now appear — to retaliate for the assassination of the head of the Lebanese Hezbollah militant and political organization.