The 17-year-old was repeatedly stabbed in front of Uniondale High School

A 17-year-old student was repeatedly stabbed to death by a younger teenager outside a Long Island high school on Monday, police said.

The teens got into a fight outside Uniondale High School around 2:45 p.m. during parole time, which Nassau police said escalated when one pulled a knife.

The alleged attacker, a 15-year-old, stabbed the other teenager in the neck, back and stomach, police officers said. The teenager, who is a student at Uniondale, was taken to Nassau University Medical Center in stable condition.

The 15-year-old escaped on a bicycle when school security guards gave chase. Shortly thereafter, he was arrested by the police. He doesn’t attend Uniondale and is a student at another school, according to Pix11.

The juvenile suspect was not identified by police because he is a minor.

Nassau Police Department is investigating the stabbing and how the suspected knifeman got onto the Uniondale campus.

The school’s parents were welcomed by Uniondale Schools Superintendent Dr. Monique Darrisaw-Akil, informed of the stabbing.

“The Uniondale School District has a zero tolerance policy for instances of violent or aggressive behavior of any kind,” Darrisaw-Akil said in the statement to parents. “The county is cooperating with law enforcement in its investigation.”

She added that advisors will be available to students on campus Tuesday.

“Rest assured that the welfare of our students is our top priority… We are actively working to review our safety procedures and protocols,” Darrisaw-Akil said.