An investigation has been launched after two trains collided at a railway station.
Eight people received minor injuries when a Greater Anglia passenger train, travelling from Great Yarmouth, struck an empty, stationary East Midlands train as it arrived into Norwich at about 12.15am on Sunday. They were taken to hospital and have now been released.
There had been a total of 31 people on board the train arriving at the station, which was "travelling at very slow speed", a Greater Anglia spokesman said.
He added: "Our first priority has been, and remains, the welfare of the passengers and train crew involved."
Gary Sanderson, of the East of England Ambulance Service Trust, said: "A total of eight patients were taken to the Norfolk & Norwich Hospital, four of which were taken in on a stretcher, and the other four were 'walking wounded'. All the injuries sustained are believed to be minor."
British Transport Police added that both trains remained upright, and on the tracks, after the collision. The force is trying to "establish the full circumstances surrounding the incident", a spokesman said.
The Rail Accident Investigation Branch has launched an investigation into the incident, and Greater Anglia is helping with their inquiries.