Twitter is facing a major outage across the globe, with both the mobile and web versions affected; the company says it is investigating the issue.
Twitter users around the world have been unable to access the social-networking site, with an apparent outage affecting both mobile and web platforms.
On the web, users saw an error message that said, "Something is technically wrong. Thanks for noticing--we're going to fix it up and have things back to normal soon."
An error message in the Twitter app said, "Tweets aren't loading right now."
"We are currently investigating issues people are having accessing Twitter," a company spokeswoman said.
Twitter, however, did not provide any details on the outage.
According to website DownDetector.com, Twitter began experiencing issues around 2.46pm New York time on Thursday (0440 AEST Friday).
DownDetector.com showed nearly 50,000 incidents of people across the globe reporting issues with the app.