A gun went off and struck a child in the arm shortly after the kid's father had finished cleaning it Wednesday in Commerce City, authorities say.
Commerce City Police say a bullet struck the child, who is under 10 years old, and hit a neighbor's home.
The child was taken to Children's Hospital Colorado, is listed in stable condition and expected to survive.
Investigators are still trying to figure out who was inside the house and who fire the shot.
No other injuries have been reported.