The Israeli military eliminated Suhail Hussein Husseini, the commander of Hezbollah's headquarters, in a strike in the area of Beirut, it said in a statement on Tuesday.
It said Husseini was responsible for overseeing logistics, budget and management of the group.
The military added that Husseini was involved in the transfer of advanced weapons from Iran and their distribution to different Hezbollah units, and that he was a member of the group’s military council.
On Monday, Iran-backed Hezbollah said it targeted a military base south of Haifa with "Fadi 1" missiles and launched another strike on Tiberias, 65 km away.
The armed group later said it also targeted areas north of Haifa with missiles. Israel's military said about 190 projectiles entered its territory on Monday. There were at least 12 injuries.
Israel's military said the air force was carrying out extensive bombings of Hezbollah targets in south Lebanon and eastern Lebanon and Beirut’s southern suburbs.
Two Israeli soldiers were killed on Monday, taking the Israeli military death toll inside Lebanon to 11.
Israeli airstrikes have displaced 1.2 million people in Lebanon.
Israeli forces issued a warning in Arabic to beachgoers and boat users to avoid a stretch of the Lebanese coast, saying they would soon begin operations against Hezbollah from the sea.
Lebanon's health ministry reported dozens of deaths, including 10 firefighters killed in an airstrike on a municipal building in the border area. About 2,000 Lebanese have been killed since Hezbollah began firing at Israel a year ago in solidarity with Hamas, most killed in the past few weeks.
The Israeli military has described its ground operation in Lebanon as "localized, limited and targeted," but it has steadily increased in scale beginning last week.
