UPDATE: A previous version of this article misidentified El Hassan Elmezayen due to incorrect information from the Los Angeles County Coroner's Office.
Authorities identified the 13-year-old boy who died after the vehicle he was riding in plunged into the water at the Port of Los Angeles Thursday.
El Hassan Elmezayen, of Los Angeles, died in the car, according to the Los Angeles County Coroner's Office.
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His brother, 8, was sent to the hospital in grave condition after being trapped in the submerged vehicle along with El Hassan. The coroner's office later identified the 8-year-old as Abdelkrim Elmezayen.
Witnesses said the vehicle drove off the edge of the harbor and into the water at around 6 p.m. near Berth 73. Both the mother and father were also in the vehicle, with the father driving, police said.
One witness said the car appeared to speed up when it drove off the dock.
They were in fair condition after being rescued from the water, according to a Los Angeles Fire spokesman.
Homicide detectives with the Los Angeles Police Department were investigating the incident, Lt. Sue Willis said Friday morning. Police officials had earlier saidd a homicide investigation was ruled out.
"As of right now it's a traffic accident, it's still being investigated. Again, it could evolve into something else," said Det. David Cortez from the LAPD.
Neighbors of the family said the parents were "peaceful people" and "good parents."