Microsoft has apologised after a robot it made "tweeted wildly inappropriate and reprehensible words and images" that included support for Hitler and genocide. The company launched Tay, an artificially intelligent robot, on Twitter last week. It was intended to be a fun way of engaging people with AI – but instead was tricked by people into tweeting out support of Hitler and genocide, and repeated white power messages. Microsoft said that it had no way of knowing that people would attempt to trick the robot into tweeting the offensive words, but apologised for letting it do so. Microsoft said that it had launched Tay after success with a similar robot, XiaoIce, in China.