A North Carolina high school student was killed and another wounded in a knife attack Thursday morning, officials said.

A “physical altercation” broke out at Northside High School in Jacksonville just after 7 a.m. that ended with two kids slashed or stabbed — and one teacher with minor injuries, cops said at a news conference.

A student was arrested in the incident, but police haven’t disclosed charges and are continuing to investigate.

Two student resource officers stationed at the school responded, with the first on the scene within 20 seconds, Jacksonville Public Safety Chief Mike Yaniero told reporters.

The two wounded students were treated at the scene and taken to a nearby naval hospital before one of the two succumbed to their injuries.

Jacksonville cops didn’t identify the suspect or victims due to their ages, but said they are investigating whether the clash was gang-related.

Classes will be held remotely Friday with in-person instruction set to resume Tuesday after the Labor Day holiday, school administrators said at the conference.