The victims do not appear to have been intentionally targeted, police said.
Police officers responded to a shooting at a business in the city of Highland, east of Los Angeles, shortly before midnight Friday, the San Bernardino Police Department said.
"Based on the preliminary investigation, it does not appear that the victims were intentionally targeted and that this may have stemmed from a conflict in a crowded room that spilled out into the parking lot of the business," Thomas said.