Three children and a woman were killed in a house fire in a Forth Worth suburb on Thursday night.

The fire was reported at a two-story home in Haltom City, Texas, at about 5:15 p.m. (6:15 p.m. ET)

Officials said fire crews pulled a 6-month-old girl, a boy who was 5 or 6 years old, a girl who was 10 or 11 years old and a woman from the house but all four later were declared dead.

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A neighbor called 911 when he noticed the fire.

"I walked out and I noticed the front window -- there was smoke coming out of it -- so I ran up to it, to the curb and I yelled, 'Hey! Your house! The house is on fire! Hey, is anybody in there?' And nobody said anything, so I called 911," Phillip Heard said.

Connie Webb, another neighbor, said the children's mother was at work when the fire broke out and rushed home in tears.

"I hugged her when she walked up and I said, 'Go to the hospital and be with your family. We'll watch out for your home and take care of everything,'" Webb added.

The cause of the fire is under investigation.