Two cars were involved in the crash that happened around 8 p.m. Sunday just west of Interstate 280 on the 100 block of Eastmoore Avenue, about a block away from Westmoor High School.
"My friend, his mother, and his little brother, they died," said a friend of the victim. "And his girlfriend is at the hospital cause she was with them too."
Friends and relatives of the victims of a fatal crash gathered at the spot their loved ones lost their lives.
Chris Gualda witnessed the horrific aftermath and told me what he saw, "Lots of fire trucks," he said. "I saw the red car in pieces pretty much. It was smashed all the way to the windshield, the whole front end of it. So like a highway accident in a neighborhood."
Relatives declined to go on camera, telling me that several of their family members have yet to be told what happened.
Police tell ABC7 News they received the report of a major accident just after 8 p.m. When they got to the scene they found three people dead in a car that had been broadsided. A fourth passenger, in the same car, was taken to the hospital with major injuries.
The driver of the second vehicle was not hurt. Police have been tight-lipped about the series of events. All they've told me is that the cause of the accident, who was at fault, and whether or not speed was a factor, are all under investigation.
"I saw the yellow tarp that they used to cover them over there in the corner," Gualda said. "You can see all the blood that's still over there in the driveway."
Residents say this stretch of Eastmoor Avenue has a history of drivers moving up and down the street faster than the posted 25 miles per hour limit.
"Look how fast that car is going up this big hill," Gualda said. "They're obviously not doing the speed limit."
The San Mateo County coroner's office has not released the names of the victims or their ages.
Daly City police are leading the investigation and may provide more information Sunday.