( CNN ) -- A Miami-Dade police officer on vacation in Puerto Rico was shot and killed Thursday morning , as was his sister who was with him , authorities said . Juan Aviles Otero , 34 , a Miami-Dade police officer since 2006 , and his sister , Jasmin Plaza Otero , 21 , were found dead from multiple gunshot wounds about 3:10 a.m. in the Puerto Rican town of Villalba , according to Agent Angel Feliciano-Torres , director of homicide investigations for the municipality of Ponce , which includes Villalba . `` When the forensics team arrived at the scene , they verified that on the body of Juan Aviles they found three little bags with white powder , '' Feliciano-Torres said . Investigators did not immediately determine what the powder was but the substance will be analyzed , he added . Such `` little baggies '' are often used to distribute drugs , Feliciano-Torres said . The two victims were driving a rental car from San Juan , about an hour away from where the bodies were found . Aviles was found inside the car and his sister was found dead just outside the car door . The bodies were transferred to the medical examiner , Feliciano-Torres said . Miami police confirmed the slaying of the officer , with police Director James K. Loftus saying in a statement that Aviles `` was murdered in the early hours ... from apparent gun shot wounds in Villalba , Puerto Rico . '' CNN Miami affiliate WSVN reported that Aviles ' wife , also a police officer , recently gave birth to twins .
Juan Aviles had been a Miami-Dade officer since 2006 . He and his sister were found shot to death in Puerto Rico . An investigator says `` three little bags with white powder '' were found on Aviles . The FBI is investigating the case as an act of terrorism, but no motive has yet been determined.