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By Keith Wagstaff

Twitter users didn't even have 140 characters to express their dismay on Tuesday morning as the service went down for several hours.

At 3:41a.m. ET, Twitter acknowledged that there was a problem, but didn't say what caused it.

Twitter users in Europe, North America, the Middle East and Africa all complained of the service going down, according to Reuters. When NBC News reached out to Twitter for more information, the company pointed toward its @Support Twitter feed, as well as its Tumblr blog, which contains the same updates.

Twitter has around 320 million monthly active users, according to the company. Many of them saw an error screen on Tuesday morning when trying to log into Twitter on the Web, as well as through apps and third-party programs like Tweetdeck.

The outage lasted for several hours. When Twitter went back up, people used it, naturally, to complain about Twitter.