Turkish police have detained nearly 200 suspected members of the organisation Hizb ut-Tahrir in raids in 23 provinces across the country.
Police said they confiscated a number of documents on Friday linking the suspects to the group which is banned in Turkey.
Founded in 1953, Hizb ut-Tahrir seeks to unite all Muslims into a single state and says its means are peaceful.
Uzbekistan blames the group for bombings in Tashkent, the capital, in 2004, which killed several people, an accusation the London-based group denies.
Turkish police have often detained members of the group in the past.