The suspects were believed to be prepared to travel to war-torn Syria
Turkey detains 54 ISIS suspects in Istanbul crackdown
Fifty-four suspected ISIS members were detained by the Turkish authorities in Istanbul, police said on Tuesday.
All those arrested were foreign nationals and were believed to be preparing to travel to conflict zones in Syria, reported the private Dogan news agency.
The report added that the police raided 19 addresses in over a dozen districts late on Monday. The suspects were transferred to the police headquarters for interrogation.
ISIS has carried out a number of bombings across Turkey in recent years, including an attack on a nightclub in the capital in which 39 people were killed and a bombing in the city’s historic heart that killed 12.
Turkish operations against the extremist group intensified at the end of last year on the anniversary of the nightclub shooting.
In April, police detained four key ISIS members including a so-called emir in charge of Syria's Deir Ezzor province.