Damian Medina, 11, and Jonathan Medina, 13, died at the scene of the crash, Los Angeles County Department of Coroner Lt. Larry Dietz said.
Jonathan Medina was known to friends as Nathan.
The boys’ father, 33-year-old Valentin Medina, was driving the Honda Civic when he claims another vehicle cut him off and caused him to lose control.
“When officers arrived they found a Honda Civic sheared in half after apparently colliding with a power pole on the south side of Los Nietos Road,” Whittier police Lt. Kent Miller said in a written statement.
“Witnesses said the victim vehicle crossed the oncoming lanes at high speed. After hitting the pole the front half of the vehicle continued a significant distance from the power pole ending up on the property of a local business.”
The second vehicle did not stop, police added.
Valentin Medina suffered “significant injuries” and was taken to St. Francis Medical Center in Lynwood.
He was listed in stable condition Saturday night.