FOUR people are in hospital following a derailment of the miniature steam train ride at Cockington Green Gardens at Nicholls on Thursday morning.

Police say a train carriage derailed, injuring passengers. The four injured people were treated at the scene by ambulance paramedics before being taken to hospital.

Police are looking for witnesses and mobile phone footage of the derailment.

Both ACT Policing and Worksafe ACT attended the scene.

Witnesses should call 1800 333000 or via the Crime Stoppers ACT website.