5-year-old killed, 11-year-old seriously injured in Martinez DUI

MARTINEZ, Calif. - A deadly crash in Martinez killed a 5-year-old child and left an 11-year-old injured early Sunday morning, according to California Highway Patrol. 

Investigators said the car that the children were in went off the roadway and struck a tree on westbound State Route 4, just west of Morello Avenue, the CHP said.

The car had three occupants inside when it crashed. 

The driver was taken to the hospital with injuries and was later arrested on suspicion of DUI and manslaughter. 

The CHP said the 5-year-old was not properly strapped into a car seat was pronounced dead at the scene, and the 11-year-old was taken to the hospital with serious injuries. 

Officials did not say if the kids in the car were related to the driver, but Candice Turner, a witness at the scene, said that the mother was OK and speaking after the accident. 

KTVU reporter Bailey O'Carroll contributed to this report.