There were about 60 people outside when a light-colored mid-sized sedan with chrome wheels and tinted windows, possibly a Chevrolet Malibu, stopped in front of the home and opened fire. The home and nearby cars were riddled with bullet holes. It was not known how many shots were fired.
Very few people have come forward with information.
"What we're doing is asking for the public to help," said San Bernardino Police Chief Keith Kilmer. "We need the public's help. We need information. We work off of information. We're pleading with the public to help us to help us, to solve this tragic crime, this savage, brutal act."
Police said the neighborhood has had gang problems, and they have not yet ruled out the possibility that the shooting was gang-related. Some of the people who were at the barbecue are reportedly not cooperating with authorities because they're afraid of retaliation.
Det. Bill Flesher of the San Bernardino Police Department said the suspect's vehicle had tinted windows, so witnesses could not tell how many people were inside the car.
A total of five victims were identified by San Bernardino Police:
"Enough is enough is enough," said Donna Moreno, 6-year-old Amarion Adams' aunt. "We the people of San Bernardino are tired. Enough is enough. Come forth, please, whoever you might be."
Moreno said Amarion was set to graduate from kindergarten next week. Instead, he's in the hospital in extremely critical condition after Sunday night's shooting.
"We spent all night at the hospital with Amarion, who has a bullet that was put into the back of his head," said Moreno.
"He was great in sports, he loved to laugh and play. But someone came up and they just stole my nephew's life," said Moreno. "They drove up, said nothing. But the bullets rang out."
Anyone with information about the shooting is urged to call the San Bernardino Police Department at (909) 384-5742.