Ayatollah Dr. Sayyid Mohammad Hosseini Beheshti was assassinated in a terror attack more than four decades ago. Beheshti and several of his colleagues were killed in the attack on June 28, 1981, when a bomb exploded during a party meeting (Hafte tir bombing).
Beheshti was assassinated the bomb explosion during a meeting of the Islamic Republic Party. The bomb was planted by the MKO terrorist group, which at that time was involved in a campaign of bombings and assassinations against officials of the Islamic Republic