Indian Prime Minister Indira Gandhi is assassinated by two Sikh security guards. Riots break out in New Delhi and other cities and around 3,000 Sikhs are killed.

Indira Priyadarshini Gandhi was an Indian politician and stateswoman who served as the prime minister of India from 1966 to 1977 and again from 1980 until her assassination in 1984. She was India's first and, to date, only female prime minister, and a central figure in Indian politics as the leader of the Indian National Congress (INC). She was the daughter of Jawaharlal Nehru, the first prime minister of India, and the mother of Rajiv Gandhi, who succeeded her as prime minister. Her cumulative tenure of 15 years and 350 days makes her the second-longest-serving Indian prime minister after her father.

Indian prime minister Indira Gandhi was assassinated at 9:30 AM on 31 October 1984 at her residence in Safdarjung Road, New Delhi. She was killed by her bodyguards, Satwant Singh and Beant Singh, in the aftermath of Operation Blue Star by the Indian Army between 1 and 8 June 1984 on the orders of Gandhi. The military operation was to remove Sikh militant Jarnail Singh Bhindranwale and other Sikh separatists from the Golden Temple in Amritsar, Punjab, the holiest site of Sikhism. The operation resulted in the death of many pilgrims as well as damage to the Akal Takht and the destruction of the Sikh Reference Library.

The 1984 anti-Sikh riots, also known as the 1984 Sikh massacre, were a series of organised pogroms against Sikhs in India following the assassination of Indira Gandhi by her Sikh bodyguards. Government estimates were that about 2,800 Sikhs were killed in Delhi and 3,350 nationwide, whilst other sources estimate the number of deaths at about 8,000–17,000.