The US government offering rewards for information about designated terrorists listed him as "a close associate of now-deceased Hezbollah commander Imad Mughniyah".
The missiles unit that Shukr headed was under the direct command of Mughniyah (also known as Hajj Radwan) until his killing in Damascus in 2008.
Urgent calls have grown for foreign nationals to leave Lebanon, which would be on the front line of a regional war, as Iran and its allies readied their response to high-profile killings blamed on Israel.
Mughinyah's role as the sole military adviser to Hezbollah's Secretary-General Hassan Nasrallah was then handed to Mustafa Badreddine, but after Badreddine's killing in 2016, there was no direct replacement.
Instead, the role of adviser was given to Hezbollah's Jihadi Council, which is composed of several key figures. Shukr was one.
'Great Jihadist Leaders'
It is notable that Hezbollah used the same description (in 2008, 2016, and 2024) in its communiques about the respective deaths of Mughniyah, Badreddine, and Shukr. All three were referred to as "the great jihadist leader".
Hezbollah has not used this description to refer to others, which implies that Mughniyah, Badreddine, and Shukr were similarly highly ranked, but unlike Mughniyah and Badreddine, Shukr's name was not well known publicly.
Followers of Hezbollah's military affairs knew about him, but otherwise he drew little attention. Mughniyah was different. His name was well-known when he was alive, in part because Israel named him as involved in smuggling missiles to Gaza.
Demonstrators hold Hezbollah and Palestinian flags during in a protest condemning the killing of Hamas chief Ismail Haniyeh, in Sidon, Lebanon August 5, 2024.
After his assassination in 2008, Hezbollah labelled him as the "leader of the two victories", in reference to his supposed roles in Israel's withdrawal from Lebanon in 2000, and Hezbollah's self-declared victory against Israel in 2006.
The group even renamed its special operations force unit after his nickname. So, since his death, the unit has been called the Hajj Radwan Force.
Though Mughniyah was replaced by Badreddine, Hezbollah did not create a similar public persona for Badreddine, neither during his lifetime nor on death.
His name only became well known publicly after his 2011 indictment by the Special Tribunal for Lebanon for the assassination of former Lebanese prime minister Rafic Hariri. Later, when Hezbollah intervened in Syria, Badreddine played a leading role.
Nasrallah's lost aura
Unlike 2000 and 2006 (that Hezbollah frames as victories), Badreddine's activities brought Hezbollah the wrong kind of attention, so the group's focus stayed on Mughniyah's martyrdom and achievements, invoked on special occasions.
It also tried to keep public attention on Nasrallah, despite Hezbollah's intervention in Syria ten years ago having eroded his image as a charismatic Arab leader. Over time, Nasrallah's once captivating speeches lost their impact.