A good Samaritan who tried to break up a fight on a Harlem subway platform was shoved against a moving train , leaving her hospitalized, police said Monday.

The 56-year-old victim sought to intervene in a fight between two men on the downtown platform for the No. 2 and train trains in the 135th St. station around 12:30 a.m. Sunday, cops said.

One of the strangers angrily shoved her and she bounced off the side of a train barreling into the station and fell back onto the platform, breaking her arm and bruising her head, officials said.

Medics took the woman to Harlem Hospital in stable condition.

Cops arrested Aaron Nett, 43, for assault a short while. He was awaiting arraignment in Manhattan Criminal Court Monday.

The city’s subway system just had one of its safest quarters on reco

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