(CNN) -- Questions about bruises on the body of actress Natalie Wood, whose body was found floating off Catalina Island in 1981, led the Los Angeles County coroner's office to change the cause of death from "accidental drowning" to "drowning and other undetermined factors." "With the presence of fresh bruises in the upper extremities in the right forearm/left wrist area and a small scratch in the anterior neck, this examiner is unable to exclude non-accidental mechanism causing these injuries," wrote Dr. Lakshmanan Sathyavagiswaran, the chief medical examiner. "The location of the bruises, the multiplicity of the bruises, lack of head trauma, or facial bruising support bruising having occurred prior to entry in the water. Since there are unanswered questions and limited additional evidence available for evaluation, it is opined by this medical examiner that the manner of death should be left as undetermined."
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"Found floating in the ocean ... Circumstances not clearly established," report says
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The case is "open and ongoing," a sheriff's spokesman says
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Wood's widower, actor Robert Wagner, is not a suspect, spokesman Whitmore adds
@placeholder writes that he went to check on Wood, but she wasn't there.