LOS ANGELES — Coroner's officials are looking into how the celebrity Web site TMZ obtained details on prescription drugs contained in an investigator's report on the death of Brittany Murphy.

Assistant Chief Coroner Ed Winter said Tuesday he didn't know how TMZ obtained the confidential report, and that he was concerned other aspects of the investigation could be leaked.

"I'm furious," Winter said. "We don't normally release partial information. If partial information goes out, it of course makes us look bad. Everybody ought to get it at the same time."

Murphy, 32, died on Sunday after collapsing at her Hollywood Hills home. Police and the coroner's office are investigating the death, but detectives have said their initial inquiry found no evidence of wrongdoing.

TMZ's report stated the investigator, who is only identified by last name, noted numerous bottles of prescription medications were found in Murphy's name at the home where she collapsed. The medications ranged from depression and anti-anxiety meds to painkillers.

Medications were also found in the name of Murphy's husband, British screenwriter Simon Monjack, TMZ reported. TMZ declined to say how it obtained the report.