The ban was expected to come into effect today.
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Some took to social media, calling the move anattackon free speech.
Spanish consumers associationFACUAwelcomes the investigation.
Telegrams lack of cooperation led the judge to take this precautionary measure, he said on Friday.
The ban may still come into effect depending on the results of the investigation.
Story bySion Geschwindt
Sion is a freelance science and technology reporter, specialising in climate and energy.
