In addition, the CBI is considered responsible for seizing historical artifacts and manuscripts in the Sikh Reference Library before burning it down Four months after the operation, on 31 October 1984, Indira Gandhi was assassinated by Satwant Singh and Beant Singh, two of her Sikh bodyguards, in what is viewed as an act of vengeance. Subsequently, more than 3,000 Sikhs were killed in the ensuing anti-Sikh riots.