Drug paraphernalia and a white powdery substance were discovered in Whitney Houston's hotel room on the day she died, according to a coroner. The full report says the 48-year-old was found on 11 February lying face down in an overflowing hotel bathtub. Investigators said they recovered a rolled-up piece of paper, a small spoon and a portable mirror in the bathroom. The autopsy concluded that the singer had drowned due to the effects of cocaine use and heart disease. The report also indicated the singer had a perforated nose, a sign of long-term substance abuse. The 42-page document gave more details than an initial report released last month. Houston was found dead hours before she was due to attend a pre-Grammy party. One of the world's best known singers in the 1980s and 1990s, Houston had a long battle with drug addiction. Friends and family have said she appeared committed to a comeback, including a new film, during the time before her death.