A Pennsylvania woman was reported dead last month just five days before a Maryland couple apparently died under similar circumstances.
Schaup-Werner, an Allentown, Pennsylvania psychotherapist, was celebrating her 9th anniversary with her husband and collapsed shortly after mixing a drink from the minibar in her room on the day the couple checked in, McDonald told Fox News.
Three Americans have died at a hotel resort in the Dominican Republic of the same causes.
American couple Edward Nathael Holmes, 63, and Cynthia Ann Day, 49, died while staying at the Playa Nueva Romana resort in the Dominican Republic.
When hotel employees checked on them, they found the couple dead. Werner reportedly performed CPR but he and emergency medical responders were unable to revive her.
McDonald also explained that Schaup-Werner's family requested for her body to be sent back to the USA for further investigation.
WUSA reports that Miranda Schaupp-Werner's brother-in-law told Fox News that she took a drink from the mini-bar, sat down to take a selfie, screamed and collapsed.
But a statement from Bahia Principe Hotels & Resorts says Schaup-Werner's cause of death was determined to be a heart attack by the National Institute of Forensic Sciences and the National Police Investigations Unit.
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"The weird issue of the same hotel and these things happening within days of each other and the complete unexpected nature of what happened to Miranda. we just want to understand this", the family's spokesman said. It was that same day they were found dead in their hotel room.
Univision reports that Robin Bernstein, the ambassador of the United States to the Dominican Republic, said the incidents were isolated cases - an assertion also made by the resort in its Wednesday statement.
The U.S. State Department released a statement to Fox News Tuesday, confirming the deaths of the three tourists. "We once again express our condolences to Mr. Werner and his family and friends on the passing of Mrs. Schaup-Werner".
The couple's bodies showed no signs of violence, police said.
The couple had posted photos of themselves on Facebook enjoying time on the beach, wading in the turquoise blue waters of the Caribbean, riding all-terrain vehicles and cruising on a boat.
Majestic Resorts said in a statement that it continues to cooperate with local authorities until they finish the investigation.
The National Police said a vehicle carrying NY tourists Orlando Moore and Portia Ravenelle plunged into the Caribbean early one morning in late March, not long after the pair left for the airport to catch a flight home.