A spokesman for Russian republic of Ingushetia's law enforcement said the DNA test confirmed the suicide bomber was Magomed Yevloyev, a 20-year-old man from the village of Ali-Yurt in Ingushetia's Nazran district.

"The blood samples, taken from the suspect's relatives and the DNA obtained from the suicide bomber's remains were identical", the spokesman was quoted by local media as saying.

Earlier, investigators confirmed they had already targeted the first suspect, but did not give his name to public.

On February 8, local reports said a court in Ingushetia's provincial capital, Magas, had ordered the arrest of Yevloyev's 15-year-old brother and the 16-year-old sister.

On January 24, a powerful blast occurred in the arrivals zone of Russia's biggest Domodedovo airport, killing 36 people and leaving over 130 injured.