Summary
Two Russian nationals have been identified as suspected ISIS suicide bombers in the attack on Istanbul's main airport that is thought to have been masterminded by a Chechen, Turkish media said Friday.
One government official had previously said the attackers were Russian, Uzbek and Kyrgyz nationals.
Chatayev is identified on a United Nations sanctions list as a leader in ISIS responsible for training Russian-speaking militants.
He was arrested in Bulgaria five years ago on a Russian extradition request but freed because he had refugee status in Austria, a Bulgarian judge said.
Turkish police on Friday detained 11 foreigners in Istanbul on suspicion of belonging to an ISIS cell linked to the attack, Anadolu reported, bringing the number of people detained in the investigation to 24 .
In a separate operation, 17 ISIS militants were detained in the southeastern city of Gaziantep on Friday, the city's governor office said in a statement.
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