Between 1988 and 1998, a series of murders and disappearances targeted Iranian dissident intellectuals — writers, translators, poets, political activists and others critical of the Islamic Republic system. Victims were killed by varied methods including staged car crashes, stabbings, shootings disguised as robberies, and potassium injections intended to simulate cardiac arrest. The pattern became widely recognized only in late 1998, after the murders of Dariush Forouhar, secretary general of the opposition Nation of Iran Party, and his wife Parvaneh Eskandari Forouhar, who were stabbed to death in their south Tehran home on 22 November 1998. Within weeks, writers Mohammad Mokhtari and Mohammad Jafar Pouyandeh disappeared and were found dead, apparently strangled, and translator Majid Sharif was found dead by a Tehran roadside, officially attributed to heart failure.
Following public outcry, Supreme Leader Ayatollah Ali Khamenei denied government responsibility and blamed unspecified foreign enemies. In mid-1999, Iranian prosecutors announced that Saeed Emami, a deputy security official in the Ministry of Intelligence and Security (MOIS), had led "rogue elements" responsible for the killings. Emami reportedly died by suicide in prison before his arrest was publicly disclosed six months later, on 3 June 1999. Colleagues including Mehrdad Alikhani, Mostafa Kazemi and Khosro Basati were also arrested. In a trial described by victims' families and international human rights organizations as a sham, three Intelligence Ministry agents were sentenced to death and twelve others to prison terms in a December 2000–January 2001 proceeding for the murders of two of the victims; the identities of those tried were kept a state secret and no photographs were published.
Investigative journalists Akbar Ganji and Emadeddin Baghi pursued reporting that implicated senior officials beyond the convicted agents; Ganji publicly named former Intelligence Minister Ali Fallahian as the "Master Key" behind the killings and alleged clerical involvement, claims rejected by government officials. Ganji was subsequently imprisoned for years on charges related to classified documents and propaganda against the state; Baghi also served a prison term. Saeed Hajjarian, a reformist newspaper editor believed to have played a key role in exposing the killings, was shot in the head on 12 March 2000 and left permanently paralyzed.
The full scope of responsibility for the chain murders remains publicly unresolved.