ORLANDO, Fla. — A 15-year-old student was fatally stabbed at a central Florida high school Thursday after he and another teen got in a fight over a girl, authorities said.

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Authorities have charged a 17-year-old in the stabbing, which took place at a school bus stop at University High School in eastern Orange County.

An argument between the two students over a girl began during lunchtime and continued after school at the bus stop, where Michael Nieves was stabbed with a pocket knife, Orange County Sheriff Kevin Beary said.

Nieves was taken to a hospital in critical condition but was pronounced dead shortly afterward.

A school resource officer caught Kelvin De La Cruz, 17, in a second-floor classroom, authorities said.

De La Cruz was charged as an adult with first-degree murder in the stabbing, sheriff’s office spokesman Jim Solomons said. It was not immediately known whether the teen had an attorney.

About 3,600 students attend the school.

Beary said the sheriff’s gang unit had been asked to investigate whether the incident was gang-related, but he added that neither student had a criminal record.