The stabbing happened along the staircase at 42nd Street and 8th Avenue near the A & C lines just after 9 p.m.
Two people were apprehended by police in the subway station, three others fled the scene.
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The victim, who has yet to be identified, was taken to a local hospital in stable condition, according to police.
The incident occurred after an apparent attempted robbery of a phone in which the victim was stabbed.
The investigation into the stabbing is ongoing.
This story will be updated as more information becomes available.
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