Homeland security chief: American injured in Istanbul attack
© Cameron Lancaster

Homeland Security Secretary Jeh Johnson said Thursday that an American is among the more than 200 people injured in the deadly attack at Turkey's largest airport this week. 

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Three suicide bombers killed 42 people and injured over 200 more Tuesday in an attack believed to be carried out by Islamic State in Iraq and Syria (ISIS) supporters.

Johnson took a tone similar to that of other Obama administration officials Thursday, saying the attack at Istanbul's busy Ataturk International Airport bore "the hallmarks" of an ISIS attack.

No organization has formally claimed responsibility for the attack; reports on Thursday said the three attackers were from Russia, Uzbekistan and Kyrgyzstan.