A video released by the Israeli military showed that the aircraft it said were used in the attack that killed Hezbollah leader Hassan Nasrallah on Friday evening were carrying 2,000-pound bombs, the American-made “shelter buster” bombs designed to pound caves in Afghanistan during the 20-year American war, according to munitions experts and a New York Times analysis.

The video showed eight aircraft carrying at least 15 2,000-pound bombs (for a total of 35,000 pounds, or 18 tons) including the American-made BLU-109 bomb with a JDAM kit, a precision guidance system attached to the bombs, according to Trevor Paul, a former U.S. Army explosive ordnance disposal technician, who spoke to the newspaper. The bombs, a type of munition known as a bunker-buster, can penetrate underground before exploding.

Wes Bryant, a former U.S. Air Force targeting specialist who also reviewed the video, agreed with the analysis. In text messages with The Times, he said the bombs were “exactly what I would expect” to be used in what Israel said was an attack on Mr. Nasrallah at Hezbollah’s underground headquarters.

Last May, the Biden administration announced that it had halted a shipment of 2,000-pound bombs to Israel over concerns about the safety of civilians in Gaza.

The video, posted Saturday on the IDF’s official Telegram channel with the caption “IDF fighter jets taking part in the elimination of Hassan Nasrallah and Hezbollah’s central headquarters in Lebanon,” shows at least eight planes in a row armed with 2,000-pound bombs. Some are too far away to clearly identify the exact model, but the closest planes are seen armed with BLU-109 bombs. This bomb model can also be identified when the video shows two planes taking off, one carrying six of the munitions. The video then shows one plane returning to the Israeli airbase at dusk without any bombs.

While the video does not show the planes dropping the bombs, Mr. Paul said videos showing explosions in Beirut’s densely populated southern suburbs, as well as the damage, were consistent with the 2,000-pound bombs carried by Israeli aircraft in the video. A New York Times analysis of verified videos, photos and satellite imagery showed that the attack destroyed at least four apartment buildings, each at least seven stories tall.

Two senior Israeli defense officials told The New York Times that more than 80 bombs were dropped over several minutes to kill Mr. Nasrallah, but they would not confirm what type of munitions were used. The Israeli military did not respond to questions from The New York Times about the bombs seen in the video or used in the attack on Mr. Nasrallah. American government officials referred questions about the munitions to the Israeli military.

Israel continued to bombard Beirut’s southern suburbs on Saturday. Visual evidence analyzed by The New York Times shows that at least 13 sites were hit on Friday and Saturday across at least three miles of the densely populated city. The full extent of the strikes is not yet clear.

Lebanon's health ministry said on Saturday that at least 33 people were killed and more than 195 injured in the strikes, and the death toll is expected to rise with many dead still buried under the rubble.

The assassination of Mr. Nasrallah was a stunning escalation of Israel’s campaign against Hezbollah in a conflict that has been going on for nearly a year. Hezbollah began firing into northern Israel on October 8 in solidarity with Hamas, which is also backed by Iran, and Israel responded repeatedly, dramatically stepping up its attacks over the past two weeks. That has raised fears of a full-scale regional war that could draw in bigger players like Iran.