Coroner's officials have ruled Whitney Houston died by drowning, but heart disease and cocaine use were contributing factors.

The announcement ends weeks of speculation about what killed the Grammy-winning singer on February 11.

Houston was found submerged in the bathtub of her room at the Beverly Hilton Hotel on the eve of 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.

Coroner's spokesman Craig Harvey says cocaine metabolites were found in Houston's system, and it was listed as a contributing factor in her death and also says the results indicated Houston was a chronic cocaine user.