Twitter went down for many users on Thursday, leaving people around the world unable to load or post new tweets.
The outage began at around 3pm BST and appeared to last for around 30 minutes.
Website monitor DownDetector registered thousands of reports from users experiencing difficulties connecting.
The highest concentration of reports came from Japan, according to an outage map.
Users in the UK, Netherlands and US also reported issues with the service.
The Independent contacted Twitter for further details.
Twitter Support wrote in a successful tweet following the outage: “Let’s see if this works… You may have had trouble sending and seeing Tweets. (Yeah, us too.) We’ve now fixed this.”