Heath dead from natural causes?

POLICE are questioning the version of events given by Heath Ledger's housekeeper as it's revealed the actor may have died from natural causes and not from an overdose of prescription drugs.

Sources intimately connected with the Heath Ledger investigation told TMZ website they believe Ledger died from a heart attack because of the small amount of drugs in his system.

"It's now appearing that the level of toxicity (from medication) in Ledger's system was low enough that it may not have caused his death. These sources say Heath's heart stopped," TMZ website reported.

Police are also questioning the housekeeper's claim she heard Ledger snoring when she walked in his bedroom as they believe he may have already been dead at that time, report TMZ.

Police are also rejecting reports that Mary Kate Olsen's bodyguards were called to the apartment to remove drugs before authorities arrived.

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