The incident was reported at New Lots and Montauk avenues around 6 p.m.
Police say the child was playing outside when gunshots rang out.
The unknown suspect fired rounds and the young girl was grazed in the head by a bullet.
She was taken to Brookdale Hospital and was said to be stable.
No arrests have been made.
The investigation is ongoing.
MORE NEWS: 2 dead in truck crash that shut down part of Long Island Expressway for 8 hours
2 killed in truck crash that shut down part of LIE for 8 hours
----------
* More Brooklyn news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube
Submit a News Tip