No group has claimed responsibility for airport attack that killed 35 people.
There was no immediate claim of responsibility for an attack at the airport.
A suicide attack on Moscow`s airport left 35 people dead and dozens wounded.
Three militants involved in the deadly twin blasts on the Moscow Metro network have been killed.
Russian investigators have identified one of the women suicide bombers who carried out the Moscow metro attacks as the 17-year-old widow of a Caucasus militant, Kommersant daily reported on Friday.
Stars celebrate Christmas
Day in Pics: 26th December
Showbiz World - December 26, 2014