The Istanbul Police Department's anti-terrorism unit launched the operation after identifying suspects involved in activities with IS members in Syria and northern Iraq, Xinhua news agency reported.

According to the report, police have identified the suspects as "terrorist fighters of foreign nationality considered a threat to the country."

The state-run Anadolu news agency said the crackdown was carried out simultaneously at 17 different addresses in seven districts and the detained suspects were taken to police stations for further legal procedures.

The Turkish government designated IS as a terrorist organization in 2013 and blames it for several deadly attacks in the country since 2015, including an attack on a Roman Catholic church in Istanbul in January that killed one person. Had died.