A young couple from Texas, David and Michelle Paul, died from an unidentified illness while they were on vacation in Fiji, according to KVUE, an Austin-based ABC TV affiliate.
Family member Tracey Calanog commented on the pair's condition to KVUE, saying that they both were "very physically fit".
"They knew something was going on with their bodies and were able to get to the hospital," she also noted.
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Fijian officials are now investigating the mysterious death of the two.