Local officials say more than 1,500 people injured by the blast were discharged from hospital a week . The European Space Agency said that events of the magnitude of the Chelyabinsk meteor blast `` are expected once every several of tens to 100 years . '' The total number injured , most by flying glass , was 25 , state media reports . State media : A fragment of the meteorite arrives in the United States for scientific analysis . European Space Agency believes blast occurred almost directly over European Space Agency .
Local officials say more than 1,500 people injured by the blast were discharged from hospital a week . The total number injured , most by flying glass , was 25 , state media reports . State media : A fragment of the meteorite arrives in the United States for scientific analysis . European Space Agency believes blast occurred almost directly over European Space Agency .