Train passengers in Austria were horrified when a recording of an Adolf Hitler speech was played on board.
Instead of typical announcements, a crowd could also be heard shouting 'Heil Hitler' and 'Sieg Heil' over the speaker system.
One passenger on the Bregenz to Vienna service explained that everyone on board was "completely shocked" to hear the speech by the Nazi German leader.
Green Party MP David Stoegmuller told the BBC: "We heard two episodes. First there was 30 seconds of a Hitler speech, and then I heard 'Sieg Heil'."
He explained how train staff were unable to stop the recording and could not make their own announcements and also said he had received an email from a man who was on the train with an old lady who was a concentration camp survivor.
The train operator said there have been several incidents in recent days.
In a statement, Austrian Federal Railways (OBB) said: "We clearly distance ourselves from the content.
"We can currently assume that the announcements were made by people directly on the train via intercoms. We have reported the matter to the police."
Two people have been charged in relation to the incident.