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A 2-year-old girl has died after she was stabbed by her father, who set fire to his North Hollywood apartment, police said Friday.

Firefighters were initially called to the apartment building at 13154 Vanowen St. for a fire about 2:30 p.m., according to a Los Angeles Fire Department alert.

One civilian was taken to a hospital in critical condition from an injury sustained prior to the fire, and another patient was believed to be taken to a hospital by a private car, LAFD's Brian Humphrey said.

Officer Drake Madison with the Los Angeles Police Department initially said one victim was a 2-year-old girl who had been thrown out a window from an unknown height.

But police on scene later said the girl, Rosario, was 13 months old and was stabbed -- not thrown -- by her father, Noe Torres.

The girl’s mother rushed the toddler to a hospital, where she later died, Madison said.

Torres, meanwhile, started a fire in the unit, Madison alleged. He was taken into custody with self-inflicted knife wounds, Madison said.

Torres emerged from the building with a knife in his chest, police on scene said.

"The cops went in and handcuffed him and they were walking him towards the police vehicle," said Guillermo Valdez, a witness to the incident. "He was just walking like nothing happened. He had the darts in his arms and in his body, with the knife in his chest just covered in blood."

Another patient, an adult female, was treated at the scene for an acute but not life-threatening illness, according to Humphrey.

"I believe it was the baby's mother. She rolled up right in the parking lot and just started yelling at him in Spanish, saying 'you better not die, you better not kill yourself because you need to pay for this'," Valdez added.

The Fire Department said the blaze was confined to one upstairs unit and the attic of a two-story 28-apartment building.

Aerial video from Sky5 showed a group gathered in the courtyard of the building, where firefighters had cut a large hole in the roof.

The complex remained locked down as of early evening while police continued to investigate.

KTLA's Mariel Turner contributed to this story.

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