Three Americans have mysteriously died within one week of one another at the same resort in the Dominican Republic, the State Department confirmed to BuzzFeed News.
A Maryland couple, Edward Nathaniel Holmes, 63, and Cynthia Ann Day, 49, was found dead Thursday in their room at the Grand Bahia Principe Hotel La Romana after they missed their checkout time, resort officials told BuzzFeed News.
Police said in a statement that Holmes and Day died of respiratory failure and fluid accumulation in the lungs, noting that blood pressure medication was found in the room. Police added that a toxicology test will be conducted.
There were no signs of violence, the resort said in a statement, adding that staffers were "deeply saddened by the incident" and will work with the authorities as they investigate.
Two days before they were found dead, Holmes posted photos of the two posing on a boat, which he captioned: "Boat 🚣 ride of a lifetime!!!"
Five days before they were found dead, another American died at the same resort but at a neighboring hotel, the Luxury Bahia Principe Bouganville.
Miranda Schaup-Werner, 41, was on vacation with her husband to celebrate their ninth wedding anniversary when she suddenly collapsed, family members told WFMZ.
After checking in on May 25, the couple went to their room to relax and Schaup-Werner had a drink from the minibar.
"At one point, she was sitting there happily smiling and taking pictures, and the next moment she was in acute pain and called out for Dan and she collapsed," her brother-in-law Jay McDonald told WFMZ.
Her husband, Dan Werner, performed CPR, and EMTs tried to revive her, but they were unable to save her.
"He was understandably in shock, but the whole thing was just so stunning," McDonald said.
The resort said in a Wednesday statement that local authorities had determined Schaup-Werner died from a heart attack.
McDonald said Schaup-Werner had a heart condition 15 years ago, but has since been cleared by a doctor as healthy.
Shortly after her family returned home, they heard about the deaths of Holmes and Day, who'd checked in the same day as Schaup-Werner and her husband.
That's when they contacted the State Department to investigate the similarities, according to CNN.
"The bizarre 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," McDonald said.
"What we thought was a freak event now we don't know," he added.
A spokesperson for the State Department said the US Embassy is "actively monitoring the investigations by Dominican authorities into these tragic deaths" and that State Department officials "stand ready to provide assistance as requested."
In their Wednesday statement, the resort said they had found "no indications of any correlation between these two unfortunate events."
This story has been updated with comment from Bahia Principe Hotels & Resorts, and to clarify that the guests were staying at neighboring hotels at the same resort.