Moscow police are searching for three male suspects after a suicide attack that killed 31 people at the city' Domodedovo airport on Monday, Interfax news agency reported.
Authorities said the equivalent of 7 tons of TNT were used used in the explosion, which occurred at 1330 GMT, dpa reported.
Dozens of people were injured in the blast and were being taken to at least four hospitals around the area, reports said.
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