A mother and three girls were injured in a house explosion in Tracy, Minn., early Sunday morning, Jim Buchta of the Star Tribune reported.
Local firefighters came on the scene at 9 a.m., and by then the house was fully engulfed in flames, the report said.
Witnesses say that the mother ran outside with her two year old girl, while the seven year old girl ran out of a side door, and a neighbor ran inside the house to rescue a two month old girl who was still in her crib, according to Janel Klein of Kare11.
Witnesses also report hearing an explosion and seeing shattered glass flying away from the house, said the Kare11 report.
The four women were taken to a local hospital, then airlifted from there to Regions hospital, according to Emily Cutts of the Pioneer Press.
The Kare11 report said the woman was listed in critical condition, while the conditions of the three girls have yet to be listed.
The cause of the explosion is still under investigation.