Micro-blogging site Twitter on Thursday appealed to a higher court in Turkey’s capital of Ankara to overrule a fine by Turkish authorities for not removing content including "terrorist propaganda."
According to a Turkish official, much of the material in question was related to PKK which is considered a terrorist organisation by Turkey, the US and EU.
A spokesperson for Twitter also confirmed that the company has taken legal action over the fine, without providing further details.
On Dec. 11, 2015, Turkey's Information and Communications Technologies Authority (BTK) fined Twitter 150,000 Turkish liras ($51,000) for failing to remove content allegedly containing "terrorist propaganda, encouraging public acts of violence and hatred."
The BTK, which invoked the 2007 Law No. 5651 (On Regulating Broadcasting in the Internet and Fighting Against Crimes Committed through Internet Broadcasting) for the fine, forwarded its decision to the company's headquarters in San Francisco, California and its attorney’s office in Turkey.
Twitter, in its lawsuit, is arguing that the fine is against the law and should be annulled.
The content Turkish authorities had asked to be removed includes tweets in relation to the PKK terrorist organisation, as well as the far-left outlawed DHKP-C.
Transport Minister Binali Yildirim said on Wednesday that Turkey would not give up its demand for Twitter to pay the fine.
Turkish courts have, on past occasions, ordered Twitter to remove illegal contents from its site, but Twitter reportedly did not comply.