Tonbridge train suspect, 18, held over knife incident
A teenager is being questioned on suspicion of brandishing a knife on a train between East Sussex, Kent and London.
British Transport Police were called at about 09:00 GMT.
Officers intercepted the Southeastern train travelling from Hastings to Charing Cross via Tunbridge Wells at Tonbridge station.
The 18-year-old man was removed from the train by police. There are no reports of injuries.