NEW DELHI: A 23-year-old Delhi University student was brutally murdered by her male friend who then burnt the body and dumped it into a ventilation shaft at his house in north-west Delhi's Rajpura area.The body was discovered after the male friend was questioned by the police over the woman's disappearance.The woman, Arzoo Singh was missing since February 2, following which a police case was registered at the Model Town police station . Singhs' friends at the DU college had told the family members that they had last seen her leaving with her friend Naveen Khatri.Family sources say that Khatri and Singh had wished to get married and but their families objected to it four months back. However, the two kept meeting. Lately Singh was reportedly having a tiff with Khatri after his marriage was fixed elsewhere. This had probably let to an argument during which Khatri had murdered Singh. The role of his family members has also not been ruled out.On February 4, Khatri was to get married to another girl, after he had murdered Singh and dumped her body."He thought that my sister will create problems during the wedding and murdered her to remove hinderances," said the Arzoo's sister Payal.