The micro-blogging site, when opened, said "Something is technically wrong".
Twitter is now down in many parts of the world. However, this is not the first time when Twitter went down. The message further reads, "Thanks for noticing - we're going to fix it up and have things back to normal soon".
DownDetector, an independent website that tracks outages via mentions across the social media, shows a huge number of users reporting problems accessing the service.
The social network, Twitter, went offline for users around the world.
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The outage seems to have hit Twitter across both platforms: web as well as app.
The DownDetector website has reported a sharp spike in the number of problems with the site around 3 p.m. United Kingdom time.
Among the several disruptions which Twitter faced, the most recent outage was reported on January 15, 2016.