An ISIS fighter is behind the suicide attack in Istanbul's historic Sultanahmet district that killed 10 people, mostly German visitors, and injured 15 others, Turkish Prime Minister Ahmet Davutoglu said Tuesday.
Davutoglu said Turkey is determined to battle the militant group until it no longer "remains a threat" to the country or the world.
Turkish authorities said a 28-year-old Syrian national carried out the bombing near a monument called the German Fountain, between the Blue Mosque and the Haghia Sofia, an area popular with tourists.
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Turkey suffered two major bombing attacks last year, both blamed on the Islamic State group.