Two teens were stabbed with a pair of scissors by a classmate Wednesday morning at a Bronx school, leaving one dead, one in critical condition, and one held for questioning, reports the New York Times.

The 15-year-old victim was reportedly stabbed in the chest and was dead on arrival at St. Barnabus Hospital. The 16-year-old victim is at the same hospital with life-threatening injuries.

Authorities arrested Abel Cendeno, 18, in the attack on his 15 and 16-year-old classmates, though the suspect has not been formally charged, according to the New York Post.

The incident occurred on the fifth floor of the Urban Assembly School for Wildlife Conservation on Mohegan Avenue in East Tremont in the Bronx. The motive for the attack is unconfirmed, but investigators believe the attacker may have been the target of ongoing bullying, according to the New York Post.

“Two of my students got stabbed and one of them died. It was about what it’s always about, bullying,” Kevin Sampson, the school’s dean, told the New York Times.

The Urban Assembly School for Wildlife Conservation has 545 students enrolled in grades six through 12, according to the New York City Department of Education. According to the 2015-2016 School Quality Snapshot, 74% of students reported feeling safe in the hallways, bathrooms, locker room, and cafeteria, compared to a city-wide average of 83%.

This is a developing story and will be updated as more information becomes available.

Feature photo: ABC 7 Screenshot