A father and his two children who were found unresponsive in their burning home in Sylmar early Monday have died.
The mother, who was also pulled from the fire, remained in grave condition, Los Angeles Fire Capt. Jaime Moore said.
The fire was reported at 4:37 a.m. in the 13700 block of Eldridge Avenue in what was described as a two-story "metal-clad, barn-like home," said Brian Humphrey of the Los Angeles Fire Department.
When firefighters arrived, they found a mother huddled with her son and daughter and the father in a nearby hallway.
All four were "pulse-less and non-breathing," Humphrey said, adding that the father had suffered some burn injuries as well.
Moore told reporters at the scene that the structure did not have any smoke alarms and the family did not appear to have had an escape plan.
A half-dozen investigators remained at the scene as they tried to determine the cause of the fire and where it started.