Friday’s air strike also killed Ali Karake, the group’s top commander in southern Lebanon, Hezbollah said on Sunday.
It has not named others who died alongside Nasrallah and Karake.
However, Israel’s military said on Sunday that “more than 20 other terrorists of varying ranks” were also killed in the attack.
The authorities in Lebanon gave a provisional toll of six dead, but given the scale of the destruction the number of dead is likely to be higher.
Beirut’s southern suburbs and south and east Lebanon have been subject to intense Israeli bombardment since Monday, with the country’s health ministry reporting more than 700 people killed and hundreds of thousands displaced.
