An eight-year-old boy has died a day after his family's car hurtled off the road and into a Los Angeles harbor. His 13-year-old brother, identified as Abdelkrim Elmezayen, was pulled dead from the water at the scene shortly after 6pm on Thursday. Their parents are in a stable condition in the hospital. Firefighters rushed to the port in San Pedro  when passers-by heard cries for help. The family of four had been driving out of a parking lot on Berth 73 when the vehicle, driven by the boys' father, veered off the edge of the harbor. Scroll down for video . Two dead: Both children who fell into the LA Harbor has died and their parents are recovering in hospital . Hero: Firefighter Miguel Meza (left) who dove into the water in San Pedro after a car carrying a family of four plunged into the water has been hailed a hero on the Facebook page of City Councilman Joe Buscaino (right) It landed upside down in the 30-foot water. Two adults were found swimming in the water when rescuers arrived, he said. Witnesses told NBC the car appeared to speed up as it neared the edge. Divers found the two boys inside the car. They had no pulses and weren't breathing when divers brought them up, and resuscitation efforts began immediately, Humphrey said. The adults were described as being in fair condition but 'clearly emotionally distraught,' Humphrey said. Firefighter Miguel Meza who dove into the water in San Pedro after a car carrying a family of four plunged into the water has been hailed a hero on the Facebook page of Los Angeles City Councilman Joe Buscaino. 'Firefighter Miguel Meza jumped into the water at Berth 73 tonight in San Pedro after a car with a family of four drove into the water. This man is a true hero in the City of Angels and I am so proud of him!' he said. Sucessful search: Divers emerge from the water as debris believed to be from the car floats to the surface where a car went off the berth and into the water . Divers working in murky water searched the car and even opened the trunk, but they found no one else in it, Humphrey said. The cause of the accident was under investigation. 'We don't know at this time whether it was an accident or an intentional event,' he said. Nearly 100 firefighters, divers and helicopter and boat crews went to the scene, Humphrey said. ABC reports that the event that led up the incident remain unknown. Witnesses told police that they heard screeching tires before the car made the plunge.
A car plunged off a road into Los Angeles harbor on Thursday, and two children pulled from the submerged vehicle were hospitalized .
The adults were described as being in fair condition but 'clearly emotionally distraught'
Witnesses said the car appeared to speed up as it neared the edge .
Firefighter Miguel Meza who dove into the water in San Pedro after a car carrying a family of four plunged into the water has been hailed a hero .