The shooting happened just outside the Gowanus Playground on Wyckoff Street Boerum Hill around 3 p.m.
A witness said the park was full of toddlers and their parents, grandparents and nannies, and that the gunfire rang out without any sort of fight preceding it.
ALSO READ | Teen shot while being chased is 3rd 16-year-old killed in 2 days in NYC
Others in the park ran and ducked for cover. The victim, an innocent bystander, was sitting on a bench at a chess table when she was shot. She was rushed to Methodist Hospital in critical condition.
Authorities say three male suspects wearing all black fled on Nevins Street.
One reportedly fled on a scooter, one on a Citi Bike, and one on foot.
ALSO READ | Equity Report: Racial gaps in health insurance in New York City
What led up to the shooting is not immediately clear.
No arrests were immediately made, and the investigation is ongoing.
This shooting was one of at least five shootings in Brooklyn on Friday.
Anyone with information in regard to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
* More Brooklyn news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube
Submit a News Tip