Police are trying to track down at least seven people that they say were involved in a group assault.
The New York City Police Department says that as many as 20 men and women attacked two people at a Dekalb Avenue subway station in Brooklyn.
It happened early in the morning on the day after Halloween.
Some of the female suspects were allegedly seen leaving the station in surveillance video, of which several stills are seen above.
Police say the victims were two women, aged 19 and 23.
They both suffered bruises on their heads and faces.
Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.