LOS ANGELES - Conservative activist Andrew Breitbart died of heart failure with no prescription or illegal drugs in his system, the Los Angeles County Coroner's officials said on Friday.
There was no significant trauma to the body of Breitbart, who died in March at the age of 43, and foul play was not suspected, a coroner's spokesman said in a written statement.
The manner of death was classified as "natural." A final autopsy report was expected to be released in about two weeks, the spokesman said.
Breitbart, the founder of a news Web site named after himself, was walking near his Los Angeles home when he collapsed on March 1, family members have said.