The suicide bomber who killed at least 10 foreigners in the heart of Istanbul's historic tourist district on Tuesday, most of them German, was a foreign member of Islamic State, Turkish Prime Minister Ahmet Davutoglu said.
Davutoglu said all of those killed in the attack were foreigners and that he had spoken with German Chancellor Angela Merkel to express condolences. Most of those wounded were also German, he said.
Speaking in Ankara in comment broadcast on television, Davutoglu vowed that Turkey would find those linked to the bomber and punish them and said that its fight against Islamic State would continue.
Turkish Deputy Prime Minister Numan Kurtulmus also said Tuesday that the bomber is thought to have recently crossed into Turkey from Syria.
The explosion in the heart of Istanbul's historic Sultanahmet tourist district also wounded 15.
Several bodies lay on the ground in the Sultanahmet square, close to the Blue Mosque and Hagia Sophia, a major tourist area of Turkey's most populous city. A police officer and witness at the scene reported also seeing several bodies and body parts.