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Turkey on Saturday blocked access to all content of the online encyclopedia Wikipedia, the latest squeeze on information access in the country.

Turkey Blocks, an organization that monitors internet censorship, said an administrative order blocked all language versions of the online encyclopedia.

Several major internet operators had complied with the order.

"The loss of availability is consistent with internet filters used to censor content in the country," Turkey Blocks said.The organization added that an administrative order was usually followed by a full court order.

Turkey's Information and Communication Technologies Authority (BTK) said the administrative measure was taken after "technical analysis and legal consideration on Law Nr. 5651."

The 18-page Law Nr. 5651 deals broadly with "fighting crimes" published on the internet.

More sophisticated and prepared internet users were still able to access Wikipedia using virtual private networks (VPN).

Wikipedia seeks "outside counsel" with Turkey mum over block

No reason was given for blocking the world's fifth most popular website, but critics on social media speculated it may have to do with this month's controversial constitutional referendum or an entry about Turkish President Recep Tayyip Erdogan.

Turkey's private NTV television network, which itself has come under criticism for censoring anti-government content, said access to Wikipedia was blocked for content supporting terrorism. It also said the block was implemented due to entries "placing Turkey on the same level as the 'Islamic State'" despite requests to remove the content.

NTV said the block would be lifted after the US-based Wikipedia implemented four demands: opening a representative office in Turkey; complying with court orders; acting in line with international law; and refraining from taking part in "operations to denigrate" Turkey.

In response to a Deutsche Welle inquiry, the Wikipedia Foundation saidthat it is "committed to ensuring that Wikipedia remains available to the millions of people who rely on it in Turkey. To that end, we are actively working with outside counsel to seek judicial review of the decision affecting access to Wikipedia. We hope the issue can be resolved promptly."

Surveillance softwareused?

A volunteer at Turkey Blocks told DW he suspected Turkish authorities used "Deep Packet Inspection" (DPI) software used by some countries for surveillance and censorship to block Wikipedia. "Normally http websites are easily blocked, but https websites such as Wikipedia are not as easy. As a result, when blocking a more advanced technique is used," she said.

"My guess is that a DPI was used to block Wikipedia. We know the Turkish state boughtDPI software before, so there is a high likelihood they use this software for censorship and intelligence," she added.

Following the block, Wikipedia was the top trending hashtag worldwide and in Turkey.

Turkish authority's move to block the hugely popularwebsite is likely to add to concerns over the deterioration in the rule of law, democracy and basic freedoms in the country.

Turkey has in recent years temporarily blocked access to numerous websites, most notably Facebook, Twitter and YouTube.

Blocking or throttling internet access has become commonduring terror attacks, mass protests or in response to the internet companies' failure to remove content.

Authorities often ask social media and internet companies to cooperate in removing content for defamation or broadly defined terrorism, particularly related to Kurdish militants.

Hundreds of websites critical of the government are blocked in Turkey.

Read more here:
Turkey blocks Wikipedia, expanding censorship - Deutsche Welle