Panorama City Boy Dies After Hit-Run Accident : Crime: It is the fourth such fatality in five days.

A 7-year-old Panorama City boy was struck and killed Sunday by a hit-and-run driver as he and his sister bolted across the street to reach an ice cream truck, police said.

It was the county’s third fatal hit-and-run accident involving children in five days. One crash claimed two lives.

Skyy Nelson was hit by a black 1982 Volkswagen Rabbit as he ran across the street behind his 4-year-old sister on Tobias Avenue at 10:25 a.m., said Los Angeles Police Officer Frank Zdroy.

Skyy ran into the street from between parked cars, police said. Witnesses told police that the driver of the car didn’t stop despite the loud sound when the child was hit.

“The car never slowed or stopped,” said a 40-year-old man who saw the accident, according to police.

Witnesses estimated the car was traveling at least 40 m.p.h. The impact knocked the victim from his shoes and threw him about 25 feet, witnesses said. The boy was put on life-support systems at Holy Cross Medical Center in Mission Hills, but he died at 4:15 p.m., said a nursing supervisor.

Neighbors said drivers frequently speed along the street.

“I’ve lived here for six or seven months and I’ve seen at least six accidents where no one even bothers to get out of their cars and exchange names,” said Ronda Anderson, who lives across the street from the accident site.

On Wednesday, a 7-year-old girl died and her 11-year-old brother was seriously injured after a car struck them on the sidewalk in the Westlake district west of Downtown.

That night, 12-year-old Amalia Godoy and her mother, Maria, 48, were killed as they crossed a Pacoima intersection where neighbors have tried for more than two years to get the city to install a traffic light. A suspect turned himself in to police about four hours later.

Police were still searching Sunday night for the driver who struck Skyy.

Southern California leads the nation in hit-and-run accidents. Last year, half of the 51,627 surface-street accidents reported to the LAPD Los Angeles Police Department were hit-and-runs.