Kumba, Mile 1 area had been invaded by the belligerent fighting in the South West region.
Sporadic gunshots echoed throughout the night until Monday morning.
A family was calm in their home when a stray bullet from one of the shooters penetrated their plank wall and hit Ajeck Hilda on her stomach.
The student of GHS Kake, later died from the wounds.
The family members wailed in pain, crying her early departure.
Source: Cameroon News Agency