The death of Anna Nicole Smith's 20-year-old son, Daniel, in the Bahamas Sunday was not due to natural causes.
Her Majesty's Coroner Linda P. Virgill tells PEOPLE
"The cause of death is not natural. However, we wish to reserve the cause of death at this time pending the toxicologist examination and report for confirmation of cause of death. Friday is the likely release date for the autopsy and toxicology report." 
Asked to clarify what causes of death are ruled out when a death is deemed "not natural," she says,
"At this point in time, there were no external injuries that appeared on the body. It's difficult to give you something more without going into the full detail." 