The incident happened just before 6 a.m. near East 179th Street and Grand Concourse.
According to the NYPD, a 24-year-old man got into a dispute with the suspect before being slashed in the abdomen and bicep. A 33-year-old man attempted to help the victim, but the suspect then slashed him in the wrist and back.
Both victims were taken to St. Barnabas Hospital for treatment. The 24-year-old is in stable condition, while the 33-year-old is in critical but stable condition.
Officers say the suspect fled into the Tremont Avenue subway station.
Anyone with information about the attack is asked to contact the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477).
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