Turkey's communications regulator has issued Twitter with a £33,000 fine for failing to remove "terrorist propaganda".
Both Facebook and Twitter have previously faced problems in Turkey. In April both sites were blocked after a court order was issued to prohibit people from sharing images of a prosecutor being held at gunpoint.
In March of last year, reports surfaced that then prime minister Recep Tayyip Erdogan promised to "wipe out Twitter" after allegations against his party were published on the site.
Authorities issuing the fine have not revealed any details about the content, though reports in the press suggest it relates to material from a political protest account that is critical of the Turkish government.
According to reports from the BBC, Twitter has chosen not to comment on the fine.