• Robert Bell Wallace, 67, of California, died while he was in the Dominican Republic for his stepson’s wedding in April.
  • He had fallen ill after having a drink from his hotel room minibar at the Hard Rock Hotel & Casino resort in Punta Cana.
  • Days later, he died at the hospital. His family said Dominican Republic officials have not revealed a cause of death.
  • Wallace’s death came about a month before three other American tourists died at another Dominican Republic resort.
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The death toll of American tourists at Dominican Republic resorts has risen after the family of a California man came forward to say he died a month before three others died in their hotel rooms at another resort.

Robert Bell Wallace, 67, of California, died in the Dominican Republic in April.

He had fallen ill after having a drink from his hotel room minibar at the Hard Rock Hotel & Casino resort in Punta Cana while in the country for his stepson’s wedding, according to Fox News.

Wallace’s niece, Chloe Arnold, told Fox News that Wallace was in relatively good health before his trip to Punta Cana.

"He was fine," Arnold said. "He and his wife arrived there at around midnight on April 10. On April 11 he had scotch from the minibar. He started feeling very sick, he had blood in his urine and stool right afterward."

She said Wallace was hospitalized on April 13 and died on April 14. Dominican Republic officials have not given the family a cause of death, Arnold said.

Read more: A woman claims she vomited blood and sustained 'chemical burns' after drinking what she believed was soda at the same Dominican resort where an American tourist died

"We have so many questions," she said. "We don't want this to happen to anyone else."

Wallace's death came about a month before three other American tourists died at another Dominican Republic resort.

Miranda Schaup-Werner, a 41-year-old from Allentown, Pennsylvania, collapsed and died suddenly on May 25 in her room at Bahía Príncipe hotel at the Playa Nueva Romana resort in La Romana after having a drink from the minibar, a relative told Fox News.

Edward Nathaniel Holmes and Cynthia Day, of Maryland, were found dead in their room at the Bahía Príncipe hotel on May 30.

Dominican Republic police told CNN that Holmes and Day died of respiratory failure and pulmonary edema, an abnormal buildup of fluid in the lungs - just like Schaup-Werner.

An official statement from the hotel said that the deaths were unrelated.

The FBI told Fox News that it is assisting the Dominican Republic in investigating the recent deaths.