The anti-terror police carried out simultaneous operations in nine districts of Turkey’s most populous city, said the source, who asked not to be named due to restrictions on talking to the media.
Operations against ISIL will continue in the same districts, with names kept secret to avoid tipping off the suspects, the source added.
The suspects were detained while preparing for an attack, according to the source, and numerous documents and digital materials linked to ISIL were also seized.
