The shooting was reported on Grand Concourse and East 170th Street around 3 p.m. while terrified witnesses watched.
Witnesses told police the three victims -- ages 16, 22 and 23 -- were walking down the street when a man approached them with his gun drawn.
According to witnesses, the suspect approached the victims from behind, said "hey" and then opened fire on the street.
The 22-year-old was shot four times: in the shoulder, twice in the arm and once in the stomach.
The 23-year-old was shot twice: in the arm and in the leg. The 16-year-old was shot in the leg.
MORE NEWS: Boy with autism robbed in Manhattan, 2nd suspect sought
All of the victims were found in the stairwell of the subway station.
The 22-year-old was taken to Lincoln Hospital while the younger victims were taken to St. Barnabas.
No arrests have been made and the investigation is ongoing.
Few other details were released.
MORE NEWS: Cops bust illegal fight club dubbed 'Rumble in the Bronx'
* More Bronx news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube
Submit a News Tip