The deceased participated in a meeting of the operations headquarters, chaired by Hezbollah military leader Ibrahim Aqil and the commander of the elite Radwan unit, Ahmed Wahbi.
Earlier, the Israel Defense Forces reported an airstrike in Beirut. As Arab media later clarified, the target of the airstrike was Aqeel, the special operations officer.
The airstrike targeted a building where a meeting between Shiite militia commanders and Palestinian officials was taking place at the time of the attack.
Eyewitnesses reported three explosions in the southern suburbs of the Lebanese capital. Residential buildings were badly damaged and there was a lot of smoke in the affected area.
Another Israeli attack on Lebanese territory came amid a worsening situation on the border between Lebanon and Israel. The new escalation follows a wave of explosions of thousands of pagers and walkie-talkies that injured Hezbollah members.