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Murphy's death a mystery

An autopsy on the body of actress Brittany Murphy (pictured) was completed on Monday, but authorities said the exact cause of death will not be known until toxicology tests are finished in four to six weeks.

As speculation mounted that prescription drugs or anorexia may have played a part in Murphy's death at age 32, the Los Angeles coroner's office said there were no signs of trauma. Police said no foul play was suspected.