WABC-TV reports, the incident happened at 9th Street and Fifth Avenue in the Park Slope section around 1 p.m.
Authorities say a woman believed to be the children's mother was taken to the hospital. The FDNY says two other victims were being evaluated at the scene.
After striking the victims, the driver crossed into an oncoming lane and crashed into a parked vehicle, officials say.
The driver was taken into custody.
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