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.

Hezbollah confirmed Saturday its longtime leader Hassan Nasrallah—the target of Israel’s aerial bombardment on the group’s Beirut headquarters—was killed during the strike, a major victory for Israel but a further escalation in the conflict.

Israel said Saturday that it killed Hezbollah leader Hassan Nasrallah, dealing its most significant blow to the Lebanese militant group after months of fighting. There was no immediate confirmation from Hezbollah.