A 17-year-old male is to appear for a bail hearing today following an incident Tuesday night at Belleville General Hospital.
Officers were called to the hospital just after 10 p.m., when the teen refused to leave after being seen by doctors.
Police say he became aggressive and threatening towards staff and his caregivers.
He was arrested for breach of undertaking and held in custody overnight.
No further charges were laid as a result of the incident at the hospital.
No one was hurt.