Less than one day after Microsoft Corp. released Tay, an artificially intelligent software chatbot that communicated through messages on social media services, the program went rogue.

On Wednesday, Microsoft’s research arm launched the software on services run by Twitter Inc., Facebook Inc., Snapchat Inc., and Instagram. Hours later, it started spewing anti-Semitic rants, which Twitter users collected and posted on social media.

One tweet from Tay, whose persona was intended to mimic the voice of an American woman aged 18 to 24, read, “Hitler was right I hate the Jews.” Another, in response to a question about the Holocaust, said “it was made up,” followed by a hand-clapping emoji.

Microsoft silenced Tay on Thursday morning and erased virtually all of its tweets. The latest tweet suggested that Tay will be offline for a bit.

“c u soon humans need sleep now so many conversations today thx,” it read.