American-manufactured 2,000-pound bombs were likely used in the Israeli attack that killed Hezbollah’s leader, Hassan Nasrallah, in Beirut on Friday night, according to a review of footage showing the operation and its aftermath by CNN and munitions experts.

An airstrike has leveled an apartment building and killed three Palestinian militants in central Beirut, as Israel appeared to send a clear message that no part of Lebanon is out of bounds.

Hezbollah senior commanders were the target of the strikes, according to a senior Israeli official, who said it was too early to confirm if the group's leader, Hassan Nasrallah, had been killed.