updated 05/04/2010 AT 4:00 PM ET
•originally published 05/04/2010 AT 4:35 PM ET
Corey Haim died from natural causes and a drug test “revealed no significant contributing factors” in his death, the Los Angeles County Coroner announced Tuesday.
The coroner attributed the cause of death to three things: damage to the air sacs in his lungs, pneumonia and a hardening of his heart muscle with plaque build-up within the blood vessels.
The former teen heartthrob, 38, who collapsed in front of his mother at her L.A. apartment on March 10, had suffered from flu-like symptoms in the days before his death, the coroner said. He had been caring for his mother, Judy, who’s battling breast cancer.