The L.A. County Coroner has just officially announced the cause of Michael Jackson's death -- Acute Propofol intoxication. The report says "other conditions contributing to death: Benzodiazepine effect." Benzodiazepines are a group of drugs (see below) used to treat anxiety and insomnia. The manner of death is ruled: "HOMICIDE." The Coroner did not release the full autopsy report -- just a press notice. It goes on: The drugs PROPOFOL and LORAZEPAM (Ativan) were found to be the primary drugs responsible for Mr. Jackson's death. Other drugs detected were: Midazolam (Versed), Diazepam (Valium), Lidocaine (topical anesthetic) and Ephedrine (used to treat hypotension associated with anesthesia). The final Coroner's report, including the toxicology report, will remain on security hold, per the LAPD.