According to Hezbollah, Mustafa Badreddine was killed in an explosion in Syria, where he was in charge of the Lebanese group's forces supporting Syria's President Bashar al-Assad.
Badreddine remains somewhat of a mysterious figure, but he has been linked to a long string of attacks, including the assassination of former Lebanese Prime Minister Rafik Hariri in 2005 and the bombing at the US Marines barracks in Beirut in 1983 that killed 241 personnel. We speak The BBC's Rami Ruhayem in Beirut about this story.
- Rami Ruhayem, BBC reporter. He tweets @ramiruhayem.
This segment aired on May 13, 2016.