NEW YORK - The Latest on a fatal stabbing at a Bronx high school (all times local):

11 p.m.

An 18-year-old high school student is accused of attacking two students with a switchblade during history class, killing a 15-year-old and gravely wounding a 16-year-old.

Abel Cedeno has been arrested on murder, manslaughter and other charges.

Police say Cedeno was taken into custody following Wednesday's attack at the Urban Assembly School for Wildlife Conservation in the Bronx. Matthew McCree was killed and an unidentified student was injured. It's unclear if Cedeno has an attorney who can comment on the charges.

Police say 15 to 20 students witnessed the attack. After leaving the classroom, investigators say Cedeno handed the bloodied knife to a school counsellor he met in the hall, and then went to an assistant principal's office and waited for authorities to arrive.

A motive for the attack remains under investigation.

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9:30 p.m.

An 18-year-old high school student accused of stabbing two students during history class, killing a 15-year-old and critically injuring a 16-year-old, has been arrested on murder, manslaughter and other charges.

Police say Abel Cedeno was taken into custody following Wednesday's attack at the Urban Assembly School for Wildlife Conservation in the Bronx. It wasn't clear if he had a lawyer.

After the stabbing, police say Cedeno handed over his switchblade and was walked to the assistant principal's office, where he quietly waited for police. The knife had a 3-inch (7.6-centimetre) blade. The school doesn't have metal detectors.

Police say they're looking at whether the teenager had been bullied, but they didn't say what prompted the stabbing. Chief of Detectives Robert Boyce says a dispute among the three had been going on for about two weeks.

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2 p.m.

Police say a high school student stabbed two students during history class, killing a 15-year-old and critically injuring a 16-year-old.

Police say the 18-year-old man then walked out into the hallway, handed a knife to a counsellor and then went to the assistant principal's office, where he quietly waited for police.

The knife had a 3-inch (7.6-centimetre) blade. The attack happened Wednesday at the Urban Assembly School for Wildlife Conservation in the Bronx. The school does not have metal detectors.

Police say they are looking at whether the 18-year-old had been bullied, but they aren't sure yet what prompted the stabbing. Chief of Detectives Robert Boyce says a dispute among the three had been going on for about two weeks.

The school dismissed classes early but planned to reopen Thursday.

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12:45 p.m.

Police say an 18-year-old attacked two teens inside a New York City school, fatally stabbing one of them and critically injuring another.

The attack happened Wednesday on the fifth floor of the Urban Assembly School for Wildlife Conservation, a middle and high school in the Bronx.

Police say a 15-year-old boy was stabbed to death and a 16-year-old was critically injured.

Police say an 18-year-old has been taken into custody, but it's not yet clear what prompted the attack.

Police didn't immediately say what type of cutting device was used.

News from © The Associated Press, 2017