Online encyclopedia Wikipedia has reportedly been blocked by Turkey’s authorities in what looks like an act of censorship by government led by Recep Tayyip Erdogan.

All language editions of the site went down at around 8am local time on Saturday, with multiple service providers affected, including Turkcell and Uydunet, according to the Turkey Blocks organization, which tracks internet freedom.

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The group says the shutdown was implemented by Turkey’s Information and Communications Technologies Authority, but no reason has yet been given for blocking the site.

“Wikipedia blocked in Turkey under administrative measure No.490.05.01.2017… No court order,” Turkey Blocks said in a tweet.

The reaction from within Turkey has been a mixed, with some people tweeting humorous images of the hardback Turkish Meydan Larousse encyclopedia.

Opposition party politician Gay Usluer of the People’s Republican Party asked whether Erdogan has something to hide.

“The AKP (Justice and Development Party) blocking access to Wikipedia again, what’s he [Erdogan] hiding?” she tweeted.

AKPMnin Türkiye'yi daha çok uzun zaman denetliyeceği belli oldu. AKP Wikipedia'ya erişimi engelleyerek yine neyi gizliyor? — Gaye Usluer (@GayeUsluer) April 29, 2017

#Wikipedia blocked in Turkey. Like Ottoman Empire banned the printing press for 300 years... — Lorîna Rengîn (@LorinaRengin) April 29, 2017

I'll try to explain what's going on in Turkey for the confused, THIS. #Wikipediapic.twitter.com/FL2vrRf4UF — Kiye Bakirci (@Kiyebakirci) April 29, 2017

#Wikipedia is dead meydan larousse is still live 😂 — Erkek Adam (@uyussssss) April 29, 2017

#Wikipedia yı engellemeniz yetmez bebeyim ya evlerden 'meydan larousse'ları da toplayıp kütüphanelere de kilit mi vursanız? pic.twitter.com/lTNVnsKfvo — Ayşegül (@keciburcuu) April 29, 2017

Facebook, Twitter and YouTube have also previously invoked the ire of Turkish authorities.

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In 2014, Twitter was blocked after audio implicating associates of President Erdogan in corruption emerged online.

The scandal led the government to take out a court order to temporarily shut down the site. Erdogan later told a rally that he planned to “wipe out” the 140-character social media platform.