VICTORIA, Seychelles (AP) — Two American sisters found dead in their tropical island villa while vacationing in Seychelles died of excess fluid in their lungs, according to police in the African archipelago nation. Police spokesperson Jean Toussaint told local media that the women were seen drinking and were helped to their room by hotel personnel the night before they were found dead. Autopsies conducted Wednesday determined the Minnesota natives died from acute pulmonary edema, or having fluid in their lungs, according to a police report obtained by Minnesota television station KARE. Many things can cause acute pulmonary edema and cerebral edema, said Dr.