The fate of a possible successor to Hezbollah leader Hassan Nasrallah is unclear following an Israeli airstrike on Beirut. Hezbollah has lost contact with Hashem Safieddine since the strike, a Lebanese security source told CNN on Saturday.

Hashem Safieddine, reported by Israel as apparently killed in its confrontation with Hezbollah, is widely seen as Hassan Nasrallah's likely successor as head of the Iran-backed group. A relative of Nasrallah,

A cousin and possible successor to Hassan Nasrallah, the Hezbollah leader assassinated by Israel, Safieddine joined the group soon after it was formed and rose quickly up its ranks.