A 15-year-old girl is in a stable condition in hospital after being stabbed in the neck in Lurgan in Co Armagh last night.
The teenager underwent emergency surgery for what were described as potentially life-threatening injuries.
The incident happened at around 9pm in the Dean's Walk area of Lurgan.
She is being treated at the Royal Victoria Hospital in Belfast.
Another teenager is being questioned by police.
The PSNI has appealed for witnesses to come forward.