Police said the victim was in a parking lot in the 2500-block of South Kolin when she was approached by an unknown man on a bicycle. The man pulled out a gun and fired.
The girl was struck in the torso and took herself to St. Anthony Hospital, where she died.
A person of interest was taken into custody for questioning, police said. Police did not say whether or not charges were pending.
The investigation is ongoing, according to CPD. No further details were immediately available.