Whitney Houston died of drowning: coroner

Los Angeles: Pop diva Whitney Houston probably had a heart attack before accidentally drowning in a hotel bathtub, according to coroner`s report which listed a poor heart condition and cocaine as contributing factors.

The autopsy results have dispelled speculation surrounding the mysterious death of the 48-year-old pop star on February 11 in Beverly Hills hotel. The singer, who was found dead in the bathtub, had traces of cocaine in her system and may have had a heart attack at the time of her death.

Houston suffered from a pre-existing condition known as atherosclerotic heart disease which is intensified with the use of cocaine and other narcotics, the Los Angeles Times reported.

"She could have had a heart attack," rendering her unconscious, and then become submerged in the filled tub, said Ed Winter, the coroner`s deputy chief for operations.

The coroner`s office found traces of several drugs ? including marijuana, the anti-anxiety medication Xanax, the muscle relaxant Flexeril as well as Benadryl ? in her system but those drugs did not contribute to her death, according to the toxicology reports, released yesterday.

Cocaine played a role but officials did not reveal how much of the drug was in her system. Craig Harvey, the coroner`s operations chief, said the toxicology findings "suggested chronic usage."

Winter said no further investigations are planned in Houston`s death. Beverly Hills police said detectives will prepare a final report, due to be released in two weeks, after they review the coroner`s findings.

`I Will Always Love You` hitmaker, who died on the eve of Grammy Awards, had a long history of drug addiction and her erratic behaviour just before her death had sparked speculation that she may have died of drug overdose, which has been responsible for many celebrity deaths in Hollywood.