NEW : British police execute search warrant in connection with Swedish investigation . Prime Minister Fredrik Reinfeldt defended Swedish society in the face of the attack . One person died , and two people were injured in the explosions . Police said they received an e - mail shortly before the attack .
NEW : British police execute search warrant in connection with Swedish investigation . Prime Minister Fredrik Reinfeldt defends Swedish society in the face of the attack . One person died , and two people were injured in the explosions . Police say they received an e-mail threat before the explosions .