Whitney Houston cause of death, Whitney Houston died from accidental drowning, but the drowning may have been spurred by heart disease and cocaine found in her system, according to the Los Angeles County Coroner's Office, which released a report on the death today.

"We had approximately a 60 percent occlusion in the arteries -- in the narrowing of the arteries," Los Angeles County Coroner's Chief Craig Harvey told ABC News Radio. "So, that condition complicated by the chronic cocaine use all combined to result in her drowning.

"The final cause of death has been established as drowning due to atherosclerotic heart disease and cocaine use," Harvey said.

In the official report under the category "How Injury Occurred," it is noted that the singer was "found submerged in bathtub filled with water; cocaine intake."

The report said that along with cocaine, metabolites were identified in Houston's system and were contributory to her death. Marijuana, Xanax, flexeril (muscle relaxant) and diphenhydramine (benadryl) were also found but were not determined to have contributed to her death.

"Other drugs were identified in toxicology," Harvey said. "However, their levels were at either a therapeutic or sub-therapeutic level; therefore, they are not believed to be contributory to the death."

Atherosclerotic heart disease is a build-up of plaque that narrows the small blood vessels that supply blood and oxygen to the heart, according to the National Institutes of Health. It is not known how long the singer had the condition.

No trauma or foul play is suspected. It is anticipated that the final coroner report will be available for release within two weeks.

Houston's family immediately reacted to the news.

"We are saddened to learn of the toxicology results, although we are glad to now have closure,' said Patricia Houston, Whitney's business manager and sister-in-law.

Whitney Houston's official death certificate was filed in Los Angeles County on Feb. 15, but the immediate cause of death was listed as "deferred" and the manner of death was noted to be "pending investigation."

Read More: abcnews