Analysis of information sources in references of the Wikipedia article "1978 Sikh–Nirankari clash" in English language version.
Between 1978 and 1980, Bhindranwale's gang started to kill the Sant Nirankaris throughout Punjab. The Sant Nirankari Bhawans were surrounded and attacked.
Thereafter, a series of murders planned and executed by Bhindranwale's men took place, culminating in the killing of Baba Gurbachan Singh