The brother of 'Shark Tank' star Barbara Corcoran has been found dead in a hotel room in the Dominican Republic.

Jonathan Corcoran, a retired New Jersey businessman, died back in April, but his death is making headlines following the spate of American tourists who have been mysteriously dying in the Caribbean Island.

"John Corcoran passed away at the end of April in the DR from what is believed to be natural causes," Barbara's assistant, Emily Burke said in a statement to Fox News. "He loved and frequently visited the Dominican Republic. Barbara would like to respect the privacy of his children and is not releasing any other information at this time."

According to NBC, Barbara was told that her brother died from a heart attack, but she does not believe that an autopsy was ever performed on his body.

The FBI is currently investigating the deaths of three other Americans who died at Bahia Principe resorts over a five-day period in May, NBC News reports.