HALTOM CITY -- Three children were fatally injured in a house fire Thursday evening, and a woman who was pulled from the house at the same time was also reported dead.None of the victims had been identified late Thursday, but were described by officials at the scene as a 6-month-old girl, a boy of 5 or 6, and a girl about 10, and a woman, possibly in her 50s.The children were pronounced dead at Cook Children¡¦s Medical Center, Winnie King,© a hospital spokeswoman, said at 9 p.m. The woman was taken in critical condition to North Hills Hospital in North Richland Hills, Matt Zavadsky, a MedStar spokesman, said. Ambulance crews were told that the woman died, he said. That could not be confirmed late Thursday.The fire was reported at 5:02 p.m. from the 4900 block of Colonial Park Drive, Haltom City Fire Chief Steve Ross said.When ambulances arrived at 5:17 p.m., firefighters had pulled two victims into the front yard and two more were pulled out not long afterward, MedStar spokesman Matt Zavadsky said.The cause of the fire, where it started and where the victims were overcome were still under investigation Thursday night, Ross said.Eight companies responded to the fire, including units from Haltom City, Fort Worth, North Richland Hills and Watauga.When the first unit arrived, Ross said, firefighters saw smoke coming from the second floor."The fire was put out quickly, and they did a thorough, rapid search," Ross said. The victims were brought out almost as soon as the firefighters got there, he said.As darkness fell, investigators could be seen coming and going from the house, which still was decorated for Christmas. The garage door was open, and inside were children's bicycles, one with training wheels.Clothing for little girls hung on a rolling rack.The house showed little external damage from fire.Check back later for more information.