Twitter users in the United Kingdom are reporting outages with the service.
Some are complaining of being hit with an error when they try to access the site.
Those who have been able to regain access have tweeted screenshots of the error.
“Something is technically wrong,” it says.
The error message adds: “Thanks for noticing – we’re going to fix it up and have things back to normal soon.”
The Down Detector website, which gives real-time updates about the status of websites, has showed some issues with Twitter in the UK and Japan