One of the victims, a 36-year-old Manhattan man, was with another man of an unknown age around 5:12 a.m. on Oct. 23 when they saw two people arguing with a third person and stepped in, police said.
As the argument escalated, the group made its way to the sidewalk outside the Manhattan Mini Storage at 543 W. 43rd St., near 11th Avenue, where one of the people involved in the initial argument stabbed the 36-year-old, the NYPD said.
When the man accompanying the 36-year-old tried to help him, one of the other people at the scene stabbed him as well, police said.
The two attackers fled westbound on West 43rd Street and southbound on 11th Avenue in a gray Toyota Camry with a New Jersey license plate, the NYPD said.
The two victims were taken to Bellevue Hospital, police said, but the extent of their injuries was unclear.
Police searched the area but were unable to find the attackers.
No one had been arrested in connection with the attacks as of Monday.