The released are employees of the Samanyolu TV channel, which is reportedly connected with Parallel State, an anti-government organization founded by Muslim cleric Fethullah Gulen.
Another 24 people arrested during raids on Sunday are also suspected of having links with Parallel State. Among them are Zaman newspaper editor-in-chief Ekrem Dumanli and Samanyolu Media Group head Hidayet Karaca.
The suspects are officially charged with "forgery, fabricating evidence and forming a crime syndicate to overtake the sovereignty of the state," Anadolu reported.
In December 2013, the raided media outlets extensively covered a probe accusing several high-profile officials of corruption and instigating anti-government protests. The government of then Prime Minister Erdogan dismissed the charges, declaring the probe a conspiracy of the Parallel State.
Since 2013, many high-ranking police officers and officials have been arrested and charged with wiretapping Turkish officials, personal information abuse and other crimes.