Turkish police detained nearly 200 suspected members of the outlawed Islamic organisation Hizb ut-Tahrir in simultaneous raids in 23 provinces across Turkey, the state-run news agency Anatolian said on Friday.
In Friday's operation police said they confiscated a number of documents linking the suspects to the Islamist group.
Hizb ut-Tahrir seeks to unite Muslims into a pan-Islamic state but says its means are peaceful. Uzbekistan blames the group for bombings in the capital in 2004, an accusation the London-based group denies.
Turkey has in the past raided Hizb ut-Tahrir and other Islamist groups, including Al Qaida, believed to operate in predominantly Muslim Turkey.