Moinuddin Nasser write,
A group of about 150 members of the shanti Bahinin headed by one Major Moni Shawpan Dewan , Launched the attack on the BDR camp and Bangali Settlers at the Bhusnanchara union of Barkal upojela in the early hours of May 31.
The insurgents, including their female cadres, in two groups launched the armed attack at 4 a. m. which continued till 8.30 a. m. They abruptly opened fire and killed the youth, women, children, elderly people and even the livestock.