Due to linguistic, religious, and cultural commonalities, members of the Islamic State and al-Qaida from Central Asia can often bypass security filters in the wider Turkic world.
Many believers were already avoiding fellowship after warning by ISIS, which claimed responsibility for the killing at a Catholic congregation in Istanbul.
IS group claims responsibility for Istanbul church attack that killed one person naharnet.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from naharnet.com Daily Mail and Mail on Sunday newspapers.