The suspects were convicted of murder, constitutional violations, attempts on 142 lives and damage to property, the Anadolu news agency said.
Three blasts hit the entrance, exit and the parking lot of Ataturk International Airport in July 2016. Among those killed were 19 foreigners. Over 230 people were injured.
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Ankara maintained that the attack was carried out by the Daesh* terror group. The Turkish president said suspects in the case hailed from Russia, Kyrgyzstan, and Tajikistan.
*A terrorist group outlawed in Russia and many other countries.