Authorities are at the scene of what has been described as a 'serious rail accident' in the south of France.
A regional train collided with a school bus in the region of Perpignan, killing four children.
The victims are said to be aged between 13 and 17, according to The Guardian.
A further nine people were injured in the accident, which occurred at a train crossing.
Emergency services have been mobilised in the area.
One witness told French publication L’Indépendant that the impact from the incident was 'violent.'
'We thought the train was going to come off the rails and turn over,' they said.