The Turkish prime minister's decision to block access to Twitter is "not acceptable," the EU's digital commissioner Neelie Kroes told CNBC, stressing that she would do her utmost to make sure the people of Turkey had freedom of speech.
Speaking to CNBC on Friday, Kroes said the move by Tayyip Erdogan was "embarrassing."
"It's cutting down freedom of speech - a value we're so proud of in the free world. He's going in the wrong direction," she said. "What we have to do is put it in plain language that it's not acceptable."
On Friday, Turkey's courts ruled in favor of a ban after Erdogan threatened to "wipe out" access to Twitter in a speech, just 10 days ahead of key local elections. Shortly after, users of the website reported widespread outages across the country.
Twitter users soon took to the micro-blogging website to condemn the move, using the searchable hashtag #TwitterisbannedinTurkey.
And even Turkey's President Abdullah Gül expressed disapproval in a tweet that can be roughly translated as: "A complete closure of social media platforms cannot be approved of."
According to Turkish website Zete.com, by 3 a.m. local time, over 2.4 million tweets had been sent from Turkey since the start of the ban.
The ban comes amid a corruption scandal in Turkey, which has seen Twitter full of tweets alleging government wrongdoing.
But Kroes added: "It's never acceptable - not before or after elections. We are talking about the values of our democracy."
Turkish telecoms watchdog BTK said Twitter had been blocked by the courts after complaints were made by citizens that it was breaching privacy, Reuters reported.
Turkish users are still able to tweet via text message, or SMS, however. Twitter highlighted the work-around on its @policy account late Thursday.
The ban in Turkey came on the eve of the eighth birthday of Twitter - one of the world's most popular social media websites, with more than 240 million active users.
The site has also proved itself as a key tool in recent struggles for democracy after playing a key role in the Egypt protests of 2011 - during which time the former government also tried to ban it, albeit unsuccessfully.
Follow us on Twitter: @CNBCWorld