Prosecutors said Bashir Khamkhoyev, Akhmed Yevloyev and brothers Islam and Ilez Yandiyev helped a suicide bomber -- Yevloyev's brother, Magomed -- by arranging his travel from Ingushetia and providing him with a bomb that exploded Jan. 24, 2011, in Domodedovo Airport's international arrivals hall, RIA Novosti reported.
The Moscow Regional Court sentenced Khamkhoyev and the Yandiyev brothers to life in prison and Yevloyev to 10 years in a penal colony.
Doku Umarov, a leader of the Islamic insurgency in Russia's restive North Caucasus region, claimed responsibility for the attack.
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