EMBED >More News Videos Chief Detective Robert Boyce says the stabbing involved students from Manhattan High School PS 35

MIDTOWN, Manhattan (WABC) -- A dispute between two teenagers escalated from a fist fight to a stabbing on the streets outside their school in Hell's Kitchen, police said.Four people were injured in a stabbing that happened near PS-35 in Midtown Manhattan.Authorities say two students, a 15 and 16-year-old, had been suspended after a fist fight at the school last week."There was a fight down the street from where we're standing right now between 2 high school students. They had fought last week - a fist fight last Thursday. Both of which were suspended from that school, this is Manhattan High School, P-35," said Robert Boyce, NYPD Chief of Detectives.On their first day, that fight resumed around 1:20 p.m. near the intersection of 8th Avenue and West 52nd Street.When one of the students began to win the first, others jumped in and a knife came out, police said."One 16-year-old began to win the fight, others then jumped into the fight. That became why the male was initially stabbed," Boyce said.The 15-year-old was stabbed twice and was undergoing surgery at Cornell Medical Center. He was expected to survive.Three others were also taken to the hospital with non-life threatening injuries.Police are seeking the 16-year-old, who they believe stabbed the victims. He fled the area, heading downtown from the scene.