Whitney Cause of Death Revealed; Case Still Under Investigation

Whitney Houston's death was the result of accidental drowning.  The autopsy also revealed that heart disease and cocaine use were also contributing factors to the legendary singer's untimely death.

Houston had cocaine in her system when she died, the coroner added. Marijuana, Xanax, Flexeril and Benadryl were also found in her system, but did not contribute to the singer's death. No foul play or trauma is suspected.

Houston was found submerged in the bathtub of her room at the Beverly Hilton Hotel, the day before the Grammy Awards.

Several bottles of prescription medications were found in her hotel room, but coroner's officials said they weren't in excessive quantities.

The coroner's office on Thursday released only a brief synopsis of its findings. A full autopsy report, which typically includes details of what investigators find at the death scene and witness interviews, is expected in about two weeks.

So far left unanswered is whether any illegal drugs were found at the scene, whether anybody from Houston's entourage is suspected of cleaning up the area before paramedics arrived, and how Houston obtained the drugs.

"It's still an open investigation for us," Beverly Hills Police Lt. Mark Rosen told PEOPLE when asked if cocaine was found in the hotel room. "I can’t disclose any details about the investigation."