LATEST DEC. 7: The North Las Vegas Fire Department reported the cause of the blaze was an accidental, unattended cooking fire.
The house sustained heavy smoke and flame damage and is considered a complete loss with damage estimated at $250,000.
North Las Vegas police also confirmed that the three inside the home were trapped after the fire started.
UPDATE DEC. 5: All 3 victims have reportedly died as a result of this fire. One of the victims has been identified as 78-year-old Ignacio Meza of North Las Vegas.
#NLVFD UPDATE, last week 2732 St. George. 3 pulled from the fire 1 adult male deceased this weekend, today the adult female and child died
— CNLV Fire Department (@NLVFirePIO) December 5, 2016
The North Las Vegas Fire Department reported Monday that the 6-year-old girl and her grandmother had also died.
Bill Fisher remembered how the 6-year-old always called him neighbor.
"She's just too young to die, just too young," Fisher said. "She had her whole life. And she was very smart."
Jimmy Rodriguez was down the street when he saw the fire and threw a rock in the window, hoping someone might be able to escape.
"I wish there was something else I could have done," he said. "I tried my hardest."
Candles and flowers have been left outside the North Las Vegas house.
If you would like to help, the family has a GoFundMe page set up.
UPDATE: In a drone video, you can see the flames shooting straight out of this home.
NORTH LAS VEGAS (KTNV) -- Three people were critically injured in a North Las Vegas house fire Thursday evening.
The fire was reported around 7:10 p.m. in the 2700 block of St. George Street, near Civic Center Drive and Evans Avenue.
Two adults and one child were transported to two separate hospitals -- Mountain Vista Hospital and UMC Trauma. Neighbors say they are an elderly couple and their 6-year-old granddaughter.
House fire on St George St in NLV closes Evans betw Civic Center & Salt Lake St. Lots of activity. Working on getting more details pic.twitter.com/HSb1EBUZX4
— Barry White (@KTNVBarryWhite) December 2, 2016
This is a developing story. Check back to 13 Action News for updates.