Deadly explosions were carried out at Brussels airport earlier today by a suicide bomber, Belgium's federal prosecutor said according to broadcasters VTM and RTBF. A further blast struck a metro station in the capital shortly afterwards. The blasts at the airport and metro station occurred four days after the arrest in Brussels of a suspected participant in the November militant attacks in Paris that killed 130 people. Police had been on alert for any reprisal action in both capitals, which lie about 315 kilometers apart across an open border.