Local officials say 25 people injured by the blast were discharged from hospital immediately . The total number injured , most by flying debris , was more than 1,500 , state media reports . State media : 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 . '' A fragment of the meteorite arrives in Moscow for scientific study . Russian Space Agency believes blast occurred almost directly over Chelyabinsk .
Local officials say 25 people injured by the blast were discharged from hospital immediately . The total number injured , most by flying debris , was more than 1,500 , state media reports . State media : A fragment of the meteorite arrives in Moscow for scientific study . Russian Space Agency believes blast occurred almost directly over Chelyabinsk .