That's when investigators said the suspects pulled out a shotgun and started shooting.
"There were just like four shots, bang, bang, bang, bang, bang, very fast and very consecutive," says witness Pam Gilles.
Four-month-old Andrew Garcia was in the car with his parents and family friends being fed when he was hit by the gunfire. Baby Garcia was air lifted to UCLA Medical Center where he later died.
"The baby was bad and all bloody," describes another witness Millie Watts
Two other people were also shot and taken to the hospital, but they are expected to make a full recovery. Officers said one of the victims is a pregnant woman.
Investigators said the suspects fled the scene on foot. The first suspect is described as a Hispanic man about 18-22 years old, about 5 feet 8-10 inches tall, with a shaved head. He was wearing a white T-shirt at the time of the shooting. The other suspect was described as a Hispanic man, about 5 feet 5 inches tall with a heavy build, weighing about 200 pounds.
"Whoever did this, I hope they have the heart to come forward and give themselves up, and at least pray for the baby," added Watts in tears.
Sunday night, a memorial of candles was held in the baby's honor, and family and friends can't believe that the four-month-old is gone, gunned down in a senseless shooting.
"He was a happy baby, and he always had a smile on his face," says Veronica Munoz.
Munoz says her family is devastated by the senseless murder of her nephew.
"Just imagining that the baby was drinking from his bottle, it's just sad," Munoz adds.
Investigators say that at this point, they don't have any solid leads on the suspects and are asking for the public's help.
Anyone with information is urged to call the Los Angeles Police Department at 1-877-527-3247.