Mom, 3 young sons fatally struck by car while crossing Phila. street

(CBS) PHILADELPHIA - Police are investigating whether a car may have been drag racing when a mother and her three young sons were struck and killed on a Philadelphia street Tuesday night, CBS Philly reports.

The woman's fourth son was injured.

The crash happened at about 10:20 p.m. in the southbound lanes of the Roosevelt Boulevard near Rockland Street in Feltonville, according to the station.

Philadelphia police say a 28-year-old mother, identified as Samara Selena Banks, and her four sons were crossing the street when they were struck by a vehicle.

Banks and her 23-month-old son were pronounced dead at the scene.

Seven-month-old Saamir Williams was rushed to Albert Einstein Medical Center, but was later pronounced dead.

A four-year-old boy was transported to St. Christopher's Hospital for Children and was pronounced dead at 4:45 a.m. Wednesday.

A four-year-old is in stable condition with bumps and bruises.

Police say the 22-year-old driver, who was driving an Audi, remained at the scene of the accident. He was taken to Philadelphia Police Headquarters for questioning.

Eyewitnesses told investigators that the driver was speeding.

"We're getting some information that they're may have been some drag racing, that's something that Accident Investigation is going to determine," Chief Inspector Scott Small said.

Charges against the driver are pending.

The deadly incident remains under investigation.