A man needed hospital treatment for a head injury after an object was thrown during a disturbance on a train from Portrush to Coleraine.
A 17-year-old was arrested and questioned following the disturbance shortly after the train departed Portrush at 9pm on Easter Sunday.
Police officers were called to Coleraine Train Station after receiving a report shortly before 9.20pm a man had been assaulted on the train.
A number of people had been removed from the train following the altercation. The PSNI said that during the disturbance an object was thrown and a man aged in his thirties suffered a head injury.
“A short time later officers arrested a 17-year-old boy on suspicion of assault occasioning actual bodily harm, possessing an offensive weapon in a public place, and disorderly behaviour,” a PSNI spokesperson said.
He was later released to allow for further enquiries.
