The assailant was reportedly angered by seeing the victim with his boyfriend.

An assailant shouting homophobic slurs stabbed a gay man on the New York City subway Saturday night in what police are investigating as a hate crime.

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The 28-year-old victim was traveling with his boyfriend and his sister on 1 train when the attack occurred. The unnamed attack became angry when he saw the victim with his boyfriend and became verbally abusive as the train pulled into the 110th Street station in Morningside Heights.

He then yelled “you faggot!” at the man, and stabbed him in the left side of the chest before fleeing the train.

The victim was rushed to St. Luke’s Hospital, where he remains in serious but stable condition.

The attacker is still at large, according to authorities.