Two people were fatally shot near a pool at an apartment complex in Newhall, including a 16-year-old boy.
The shooting was believed to be gang-related, and authorities have detained two persons of interest, but no charges have been filed yet.
Witnesses reported seeing a man reach over the pool fence and start firing a firearm before fleeing towards a parking lot in the north direction.
A vehicle matching the description was later spotted, and two men inside were detained.
The investigation is ongoing.