At least 15 people were injured when a tram collided with a lorry in central Germany on Monday.
Among the injured was the driver of the lorry, who was stuck in the vehicle with serious, but not life-threatening injuries, police said.
He had to be rescued by the fire department in the city of Kassel.
The lorry was transporting motor oil in 1,000-litre plastic tanks, one of which was damaged during the incident, causing oil to leak out.
Police are investigating the cause of the accident.