Florida authorities are investigating the deaths of two sheriff’s deputies who were found dead in a vacation home Saturday night.

The Hillsborough County Sheriff’s Office released a statement saying two off-duty deputies died by apparent murder-suicide. A preliminary investigation showed that one of the deceased, Detective Daniel Leyden, died by a self-inflicted gunshot wound and was the “sole shooter” of the unidentified victim. The two were in a romantic relationship, according to the statement.