Police officers have carried out night-time raids in the central Turkish city of Konya.
The security forces are looking for suspected ISIL militants.
Turkey: Around 30 suspected Islamic State terrorists arrested in Konya https://t.co/7II94LqaZ2— ESISC (@EsiscTeam) 27 Octobre 2015
Officers say at least 30 people were detained.
The sweep comes a day after a series of police raids were launched on more than a dozen houses in the southeastern city of Diyarbakir.
Seven suspected militants were killed and 12 arrested.
Action intensifies after Ankara and ahead of election
Anti-terrorism operations have been extended after a double suicide bombing in Ankara killed more than 100 people.
Turkey is also preparing for an election next weekend.