Baba Buta Singh was succeeded by Baba Avtar Singh. In the 1960s, the rapid growth of the Sant Nirankari Mission aroused the ire of fundamentalist Sikhs and led to violent clashes. There were significant violent clashes in 1978 that led to Operation Blue Star and the 1980s insurgency in Punjab. In 1980, Gurbachan Singh, third head (satguru) of the Mission, was assassinated by Ranjit Singh, a member of the Akhand Kirtani Jatha. The Jatha, shortly before the killing, had been involved in protests against the followers of the Sant Nirankari Mission. After the assassination of third guru Gurubachan SIngh, his son Baba Hardev Singh succeeded as the head of the organisation and spread the Mission’s message of universal brotherhood through God-realization until his death on 13 May 2016. On 17 May 2016, Baba Hardev Singh’s wife, Savinder Kaur succeeded him and became the first woman to lead the Sant Nirankari Mission. On 17 July 2018, Sudiksha Singh, daughter of former head of the mission Satguru Baba Hardev Singh and Mata Savinder Hardev, was declared as Nirankari Satguru and the Spiritual Head of Sant Nirankari Mission with the blessing of Satguru Mata Savinder Hardev.