Chandler Police Detective Eva Zermeno said the person flagged down a patrol officer around 3 a.m. near Arizona Avenue and Ray Road. Upon opening the garage, the officer discovered 18-year-old Romeo Elias Alvarez and a 17-year-old male deceased. Police have not identified the second teenager.

Police believed their deaths were accidental, based on the preliminary investigation.

Detectives were waiting Wednesday evening for the Maricopa County Medical Examiner’s Office to determine the cause of death of the teenagers.

This is a developing story. Check back for updates.