Three young people are dead after sneaking in to an apartment complex pool, and so far what happened to them remains a mystery. The bodies of Abril Yuliana Flores-Ojeda, 15; Brian Manuel Benites, 16; and Luis Enrique Delgado-Romero, 21, were found in the Durham, NC, pool around 3:30am Tuesday, WRAL reports. Police say they likely hopped the fence to go swimming—a popular activity with local teens. A fourth person, who survived, was with them and police are questioning him to try and figure out what went wrong, the Washington Post reports. The victims died by drowning, but beyond that, answers are few. Police say there are no indications of foul play, the News & Observer reports.
A police spokesperson says the victims—a girl, a boy, and a man, none of whom lived in the apartment complex—did not appear to have been electrocuted, but that the investigation is ongoing. Autopsies are being conducted. Local news broadcasts showed images of investigators removing what appeared to be clothing from the scene; police also found beer cans. The pool had been inspected by the county health department less than two weeks prior to the incident, and found to be "in very good condition." "There has been lots of speculation, but no one knows for sure" what happened, says a health department rep. (Read more drowning stories.)