Suspects were detained in simultaneous operations carried out by Police Special Forces in Elazig, said the source, who asked not to be named due to restrictions on speaking to the media.
Among the suspects were four Syrian and three Iraqi nationals.
Security forces have been involved in a long-running campaign to clear Daesh terrorists from Turkey.
More than 300 people lost their lives in Daesh-claimed attacks in Turkey, where the terror organization has targeted civilians in suicide bomb, rocket, and gun attacks in recent years.
