WARNING: The video in this story is graphic.
NEW YORK (1010 WINS) -- A man armed with a large knife repeatedly stabbed and killed a subway rider in the Bronx in an unprovoked attack on Thursday—one of at least three knife assaults in the transit system within hours.
LISTEN TO 1010 WINS
The suspect remained at large Friday, police said as they released horrifying video of the brazen stabbing at the elevated 176th Street station in Morris Heights.
The 38-year-old victim was getting off a northbound 4 train with other subway riders when his assailant came up with a “large” knife, police said.
The man stabbed the victim repeatedly in the back and chest before fleeing to street level, according to police.
Video shows riders rushing for safety as the suspect, wearing a black hoodie, repeatedly stabs him on the platform.

EMS responded to the station and rushed the victim in critical condition to St. Barnabas Hospital, where he died Friday morning.
The suspect was last seen fleeing westbound on E. 176th Street.
The heinous killing was one of at least three unrelated knife attacks in the subway system on Thursday.
A man was stabbed in the upper back during a fight at the 125th Street station at St. Nicholas Avenue in Harlem around 1 p.m. The victim was rushed to Mount Sinai Morningside and is expected to survive.
Then around 5 p.m. in Brooklyn, a 45-year-old man was slashed in the face by a man who followed him into the Grant Avenue station at Pitkin Avenue in East New York. The victim was taken to Brookdale Hospital, where he needed multiple stitches to his face. Police described the suspect as “unknown” to the victim.
No arrests have been reported in any of the attacks.
Thursday’s killing came less than a week after a homeless man slashed a subway rider to death last Friday night on an L train heading to the Atlantic Avenue station. Alvin Charles, 43, allegedly slashed the throat of 43-year-old Tommy Bailey, a union steamfitter from Canarsie with two children, as the two men argued on the train.
Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS.