Passengers on an ICE travelling from Berlin to Saarbrücken were shocked after windows were shattered by what they believe were bullets.
Police are investigating after windows on the ICE high-speed train were shattered during the journey from the German capital to Saarbrücken in Saarland.
Some passengers said that they believed the train had been shot at by a weapon. This passenger's photos posted on Twitter show the damage to the windows.
No-one was injured in the incident which happened around 10.50pm on Thursday near the city of Ladenburg near Mannheim in Baden-Württemberg.
Another passenger said that it looked like four shots had caused damage.
According to the police in Karlsruhe, there was damage to doors, windows and the outside of the train. The 150 passengers aboard were taken off the train at Mannheim. They were advised they could travel on other trains or be accommodated in hotels for the night.
Police said no objects had entered the interior of the train, only damaging the outside.
Baden-Württemberg police said officers were investigating for "dangerous interference with rail traffic" and have urged any witnesses to come forward.
The train has been sealed off and is currently in Frankfurt. Special police and rail investigators are probing the incident to establish what happened.