Doğa Baskan, a reporter for opposition newspaper Evrensel, was arrested following the publication of a news story that was later removed.
Baskan was summoned for questioning and sent to prison on the grounds that there was a risk of her absconding.
The article was subsequently removed, and she was later released.
The Erdoğan government continues to exert pressure on the opposition press.
Meanwhile, journalists close to the AKP government are not prosecuted or held liable for the dozens of false news stories.