It happened at 2:05 a.m. in the foyer of a building at Nostrand Avenue and Rutland Road in the Prospect-Lefferts Gardens section.
One woman was shot in the back, and another woman was shot in the arm.
A man was also shot.
The victims were taken to Kings County Hospital.
There is no word yet on their conditions.
Police say it's not yet clear what led to the shootings, and there have been no arrests.