BROOKLYN - Three teens beat and robbed another teen on the 3 train and stole his cellphone and MetroCard, according to police. 

The incident happened in December at the Saratoga Avenue station. Investigators say the two male and female suspects are all 16 years old. 

Police say one male suspect punched the teen in the face, while the other male stole his cellphone and transportation card.

Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS.