Here are the top 10 facts of 1984 anti-Sikh riots:
The riots broke out after the assassination of Indira Gandhi by her Sikh bodyguards - Satwant Singh and Beant Singh - on October 31, 1984.
Groups of armed men targeted Sikhs across Delhi and attacked their houses and shops.
On November 1, armed mobs were seen on Delhi streets, gurudwaras were vandalised and innocent Sikhs killed.
The worst-hit areas were Trilokpuri, Shahadara, Mongolpuri, Sultanpur, Nand Nagri and Geeta Colony.
Official Indian government reported about 2,800 Sikhs were killed in Delhi.
Around 20,000 fled Delhi and over a thousand were displaced, said reports.
Sikhs in Himachal Pradesh, Haryana, Rajasthan, Madhya Pradesh and Uttar Pradesh were also targeted.
Former union minister HKL Bhagat, Congress leaders Jagdish Tytler, Congress lawmakers Sajjan Kumar, Lalit Makan, Dharam Das Shastri, were some of the key accused in riots cases, for instigating mobs.
Delhi High Court convicted Congress leader Sajjan Kumar in a 1984 anti-Sikh riots case and sentenced him to life imprisonment.
Sajjan Kumar and four others were sentenced in a case related to the murder of five members of a Sikh family - Kehar Singh, Gurpreet Singh, Raghuvender Singh, Narender Pal Singh and Kuldeep Singh - in Delhi Cantonment on November 1, 1984