On 25 August 1978, Sadr and two companions, Sheikh Mohamad Yaacoub and journalist , departed for Libya to meet with government officials at the invitation of
Muammar Gaddafi. The three were last seen on 31 August. However, supporters of the missing cleric pointed out that Sadr's baggage was found in a
Tripoli hotel and there was no evidence of his arrival in
Rome. Lebanese Parliament Speaker
Nabih Berri claimed that the Libyan regime, and particularly the Libyan leader, was responsible for the disappearance of Imam Musa Sadr, as London-based
Asharq Al-Awsat, a Saudi-run pan-Arab daily, reported on 27 August 2006. According to Iranian General Mansour Qadar, the head of Syrian security,
Rifaat al-Assad, told the Iranian ambassador to Syria that Gaddafi planned to kill Sadr. Following the fall of the
Gaddafi regime, Lebanon and Iran appealed to the Libyan rebels to investigate the fate of Musa Sadr. Lebanese political analyst Roula Talj has said that Gaddafi's son,
Saif al-Islam Gaddafi, told her that Sadr and his aides, never left Libya. She noted, however, that Saif al-Islam stopped short of "acknowledging that Imam Musa al-Sadr is still alive". She added, "based on my own analysis and people's reactions to this, I believe he is still alive". According to a representative of Libya's
National Transitional Council in
Cairo, Gaddafi murdered Sadr after discussions about Shia beliefs. Sadr accused him of being unaware of Islamic teachings and of the Islamic branches of Shia and
Sunni. According to other sources, Gaddafi had Sadr and his companions murdered at the request of
Palestinian leader
Yasser Arafat. At the time, the Shias and the Palestinians were involved in armed clashes in
Southern Lebanon. According to several sources, there was tension between Sadr and Khomeini as Sadr did not recognize him as the supreme religious authority of the Shiite world. The alleged rivalry between the two is what caused Gaddafi to eliminate Sadr at the request of
Ayatollah Ruhollah Khomeini, who regarded Sadr as a potential rival. Gaddafi later supported Khomeini in the
Iran-Iraq War. According to a former member of the Libyan intelligence, Sadr was beaten to death for daring to challenge Gaddafi at his house on matters of theology. In an interview with
Al Aan TV, Ahmed Ramadan, an influential figure in the Gaddafi regime and an eyewitness to the meeting between Sadr and Gaddafi, claimed that the meeting lasted for two and a half hours and ended with Gaddafi saying "take him". Ramadan also named three officials who he believes were responsible for the death of Sadr. In 2011,
Abdel Monem al-Houni claimed that Sadr's body was sent to
Sabha in Gaddafi's private jet and buried there. The plane was flown by Houni's cousin, Najieddine Yazigi, who was later murdered to preserve the secret. In 2021,
Muqtada al-Sadr, the cousin of Musa Sadr and leader of the
Sadrist Movement in Iraq, announced that a committee has been formed to investigate the fate of Musa Sadr. In September 2025 the BBC World Service reported on the possible discovery and identification of Musa al-Sadr's body in Libya by Lebanese-Swedish journalist Kassem Hamadé, who had been tipped off about a secret morgue in Tripoli while reporting on the
2011 Libyan Revolution. The bodies in the morgue were believed to have been preserved for 20–30 years. Upon investigating, Hamadé took a photograph of the corpse of an unusually large, bearded man, who bore signs of execution. Facial recognition analysis performed using the photograph by Hussain Ugail of the University of Bradford revealed a match with al-Sadr's confirmed appearance, indicating that the body likely belonged to al-Sadr himself or a close relative. Hamadé further disclosed that he had taken a sample of the corpse's hair for DNA analysis and sent it to the Lebanese government but the file had been declared lost due to "technical reasons". ==Legacy==