Underworld don Dawood Ibrahim reportedly has been hospitalised in Karachi city of Pakistan due to serious health complications, said the sources on Monday. It has been speculated that he was poisoned, however, there is no confirmation of this report.Dawood Ibrahim hospitalised amid deteriorating health He had been in the hospital for two days by Monday, the sources said.According to the sources, Dawood Ibrahim is being kept under tight security inside the hospital, and he is the only patient on his floor. Only top hospital authorities and his close family members have access to the floor.Mumbai Police to fetch more informationMeanwhile, the Mumbai Police are constantly trying to gain more information on the hospitalisation of the underworld don from his close relatives Alishah Parkar and Sajid Wagle.In January this year, the son of Haseena Parker, Dawoods sister, told the National Investigating Agency that the underworld don stays in Karachi after marrying for the second time.The NIA also suggested in its chargesheet against Dawood Ibrahim that he and his key associates control Karachi airport.