There are reports that it is an Israeli revenge attack.
According to the Reuters news agency, the attack was aimed at a Hezbollah commander, whom Israel has identified as responsible for the rocket attack on the Golan Heights, where several children died after a soccer field was hit.
Hezbollah has denied involvement in the attack.
Israel takes responsibility
Israel has claimed responsibility for the explosion.
Reuters refers to Lebanese media that state that the explosion took place in a suburb south of Beirut, and that it is unclear whether it should have been a drone or a fighter plane.
Israeli Haaretz reports that the attack targeted Fouad Sukar, described as number two in the Hezbollah hierarchy.
The text is updated