03/18/2010 05:12 am ET Updated May 25, 2011

Brittany Murphy Death Cause: Autopsy Update Adds Confusion

An official Brittany Murphy death cause may not be released for some time.

Original reports said Murphy apparently died of natural causes, specifically cardiac arrest.

But tonight, it was announced that an official cause of death has not been declared, and may not be for perhaps five or six weeks. Radar Online states the delay is due to additional toxicology and neurological tests being done.

Rumors are swirling that a Brittany Murphy anorexia connection may have something to do with how she died.

Los Angeles police are not ruling out the possibility of a drug overdose, according to reports.

Reports have also surfaced that Murphy was sick just days before her death from flu-like symptoms.

This is a developing story. Updates will be added later.