A Twitter user in Japan has been banned from using the social networking site for making a death threat against a mosquito.
Tweeting abuse would sometimes get you banned from the platform but Twitter's decision to ban user @nemuismywife has attracted ridicule on social media.
It started on 20 August when he was repeatedly bitten by a mosquito as he was watching TV.
After killing the mosquito, he tweeted: "Where do you get off biting me all over while I'm just trying to relax and watch TV? Die! (Actually you're already dead)." He added a picture of a dead insect to his tweet.
Some time later he received a message from Twitter saying his account had been frozen and cannot be reactivated.
He set up a new Twitter account, @DaydreamMatcha, to criticise Twitter's decision.
He tweeted: "My previous account was permanently frozen after I said I killed a mosquito. Is this a violation?"
His angry tweet was retweeted more than 31,000 times and liked more than 27,000 Twitter users:
蚊を殺害したら前のアカウントが永久凍結されました、これは違反行為でしょうか？— KBYSHYT (@DaydreamMatcha) August 26, 2017
Some reports claimed the tweet was flagged by an automated programme and not by a human moderator.
US business magazine Fortune reported that Twitter launched an algorithm to detect abusive behaviour by looking and picking up key offensive words.