EAST NEW YORK (WABC) -- Police are searching for four people involved in a series of robberies on the J train in Brooklyn and Queens.
They're accused in three attacks and robberies on the rails.
Police say on May 10th they threated an 18-year old on a northbound J train with a knife, before punching him in the face and stealing his iPhone and his bag.
Just four minutes later, the suspects are accused of attacking a 47-year old man and taking his iPhone.
Two days before, police say they stole cash and a Metrocard from a woman, also on the J train.
The victims refused medical attention and no other injuries were reported.
Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 800-577-TIPS.
The public can also submit their tips by logging onto the Crime Stoppers Website at http://WWW.NYPDCRIMESTOPPERS.COM or texting their tips to 274637(CRIMES) then enter TIP577.
4 suspects sought in attacks and robberies on NYC subway train