Curiel was sitting in the frontyard of a residence with Javier Zamora, a 20-year-old Latino, when someone shot at them, said Ed Winter, a spokesman for the coroner's office.
The shooting happened about 5:15 p.m., and both victims were pronounced dead at the scene at about 6 p.m.
No other information was immediately available.
-- Anthony Pesce
Follow The Homicide Report on Twitter @latimeshomicide.
Map: The location where Justin Curiel and Javier Zamora were shot. Credit: Google Maps