Police say the teen was taken into custody by the FBI at a relative's home in Alabama, following a warrant for his arrest.
Police say he stabbed a 16-year-old student twice at New Rochelle High School Jan. 18. The injuries were not life- threatening.
He is being held in a juvenile detention facility in Alabama while authorities work out the details of his extradition.
The attack was third assault in an eight-day span involving New Rochelle High School students.
----------
* More Northern Suburbs news
* Send us a news tip
* Download the abc7NY app for breaking news alerts