(CNN) -- Six people, including four children, died Monday in a house fire in Weleetka, Oklahoma, authorities said.
The children's ages were between a few months and 11, said JoAnne Sellars, assistant state fire marshal. She said two adults also died in the fire, though the victims' identities were not immediately available.
One child, who Sellars described as a 9- or 10-year old boy, escaped the flames. He ran to the house of a neighbor, who called the fire department at around 5:15 a.m. Monday, Sellars said.
"People were in their beds or very close near to their beds. So it does indicate possibly that they were asleep," she added.
Authorities at the scene are investigating the cause of the fire. Reports so far have suggested the inside of the single-story, family house suffered far more damage than the outside, said Sellars.
Dan Parish, Weleetka schools superintendent, said the fire chief notified him Monday morning that the fire had claimed two children who went to city schools. Counselors were talking to the victims' classmates, Parish told CNN affiliate KOCO-TV.
Video from CNN affiliates KWTV and KOTV showed the home gutted by fire, officials removing covered bodies on stretchers and a hearse slowly pulling away from the scene.
Weleetka is about 85 miles east of Oklahoma City.
CNN's Devon Sayers, Shelby Lin Erdman and Patty Lane contributed to this report.