Michael Clarke Duncan died of natural causes

LOS ANGELES, Sept. 5 (UPI) -- The Los Angeles coroner's office has confirmed actor Michael Clarke Duncan died of natural causes weeks after suffering a heart attack.

Assistant Coroner Chief Ed Winter told E! News he concurred with Duncan's personal physician, who said the Oscar nominee's death Monday at age 54 was natural.

The 6-foot-5, 300-pound actor starred in the films "The Green Mile," "Armageddon," "The Whole Nine Yards," "Daredevil," "Talladega Nights: The Ballad of Ricky Bobby," "Planet of the Apes," "The Island" and "Sin City." He suffered a heart attack July 13 and was hospitalized until his death.