Karnal, May 25 -- A 22-year-old man shot dead three members of his own family over a land and money dispute in Bichpari village of Ambala on Saturday evening, police said on Monday. Police said the accused Abhishek Kumar, 22, allegedly fired at his grandmother Isro Devi, 90, after an argument broke out. When his elder brother Sandeep Kumar, 40 and uncle (chacha) Mahinder Singh, 50, tried to intervene, heopened fire on them too, they added. While the grandmother died at the spot, his uncle and elder brother succumbed to their injuries on the way to the hospital. Mahinder's wife, Sunita, was also injured in the firing and was taken to GMCH-32, Chandigarh, where her condition is said to be critical. The whole incident was captured on CCTV, and a video clip of it went viral on socialmedia. According to locals, the family had been embroiled in an ongoing dispute over a contract for soil mining on their land and some money matters. The claim was confirmed during police investigation. The accused's grandmother Isro Devi has two sons Satbir Singh and Mahinder Pal who live separately. Mahinder has no children of his own; consequently, Satbir's elder son, Sandeep, 40, looked after him. Meanwhile, the younger son, Abhishek, resides with Satbir. Sandeep's wife Neha, the complainant in the case, alleged that both Abhishek and Satbir, in connivance with each other, sold sand from their part of land and from the land belonging to Mahinder. After learning about this, Mahinder and Sandeep demanded their share, but they refused, leading to continuous arguments, she added. Meanwhile, Satbir told the media that Mahinder would often side with Sandeep, which would lead to fierce rift in the family. According to the police, when Abhishek returned home on Saturday evening, an argument broke out within the family. The altercation quickly escalated into such a violent confrontation that the accused, Abhishek acting in a fit of rage shot his 95-year-old grandmother Isro Devi, who died instantly. The accused fled the scene. Upon receiving information about the incident, a police team arrived at the site, took custody of the bodies, and sent them for a post-mortem examination. Superintendent of police (SP) Ajit Singh Shekhawat said that a case was registered at Shahzadpur police station and several police teams are making efforts to nab the accused. Probe is also underway to reveal whether the accused had been planning the attack for a long time and how he procured the pistol....