Police in Manchester, United Kingdom, yesterday seized a 3-D printer and what they said were 3-D printed gun components, which would be a first in the UK. They arrested a man involved on suspicion of making gun powder, who told the BBC: “It’s nothing to do with a gun whatsoever.”
Soon after the announcement, coder and writer Dj Walker-Morgan tweeted that the components in the police photographs were just parts of the printer. For a comparison of the parts, see this New Statesman post. Of course, the police might have just posted photos of the wrong parts.