Hashen Safieddine, widely expected to succeed slain Hassan Nasrallah as leader of Hezbollah, has been unreachable since an Israeli air strike on Friday, three Lebanese security sources told Reuters.

Israel’s intensifying attacks on Lebanon in its expanding war against Hezbollah and the armed group’s allies continued overnight into early Saturday. Strikes near Beirut were ongoing on Saturday morning, according to Lebanese state media, and Hamas said one of its officials had been killed in a strike in the country’s north.