A brief statement from the Gaziantep governor's office issued Tuesday said two of the suspects were detained Feb. 14 in the province that borders Syria, while the third suspect was captured a week later in the neighboring province of Adiyaman.
Two other suspects who were also detained were allowed to go free pending a trial.
The statement says the suspects were rounded up in a raid that was carried out with information provided by two senior IS operatives during questioning earlier in the month.