OKLAHOMA CITY - A mother and her two children escaped their burning home Wednesday night but not unscathed.
Flames engulfed the home in the 5900 block of S. Francis in southwest Oklahoma City.
Two little boys suffered critical burns in the fire and their mother was also injured.
One of those boys has been flown to a Dallas hospital and the other is in critical condition here in the metro.
Just 4 and 5 years old, the boys were burned when their home went up in flames.
Initially there were reports they had been playing with matches but Thursday investigators said that was not the case.
Neighbor Ricky Little said, "They are just good kids; they never cause no problem."
Neighbor Samuel said, "Earlier that day there were outside having fun and at night, I don't know what happened."
The boys' mother called 911.
In a tape of the call you hear her pleading with a dispatcher to send help.
Fire crews said it took less than three minutes from the time of the call to the time they began fighting the fire.
Little said, "The flames were like three-foot high over this house and the street was just black with smoke."
The boys' mother was burned but has since been released from the hospital.
Investigators are trying to determine a cause but said it does not appear to be suspicious.
OKC Fire Deputy Chief Marc Woodard said, "I know there's some speculation but what our investigators have told me is they do not believe it was human generated."
One thing investigators do know is there was not a working smoke detector in the home.
"If you care about your family and love your family, it is probably the most important thing you can do," he said. "Number one, have a working smoke detector in your home and number two, have an exit plan."
Sadly, the family's home is a total loss.
There was a third child in the home crews said was not injured.
Fire crews said the family is lucky they made it out since they did not have any working smoke detectors.
Investigators said they do not believe this fire is suspicious.