A website that allowed users to share subtitles has been taken offline after the Swedish police raided two properties used by the service.
Undertexter had provided fan-made translations of film and TV show dialogue, which could be merged with video files to provide on-screen text.
A spokesman for the police told the BBC they had acted after investigating a complaint by copyright holders.
Undertexter's managers insisted they had not broken the law.
Critics have suggested the raid marked an escalation in Hollywood's efforts to protect its intellectual property.
However, the Rights Alliance - the organisation that prompted the police to act - said it was not the first case of its kind in Europe.
Read more: http://www.bbc.co.uk/news/technology-23252523
