An Australian court on Friday sentenced a 22-year-old student from Punjab to life imprisonment for stabbing two of his Indian flatmates to death over a dispute. Jagdeep Singh pleaded guilty to murdering Navdeep Singh, 20, and Kawaldeep Singh, 19, on February 11 this year.During the sentencing, Justice John McKechnie in the Perth Supreme Court, noted the high level of stabbings carried out by young men in Perth.