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British police arrest second man over London train bomb

police-officers-stand-in-front-of-barriers-forming-a-cordon-around-a-property-being-searched-after-a-man-was-arrested-in-connection-with-an-explosion-on-a-london-underground-train-in-sunbury-on-thames-britain-september-17-2017

A second man has been arrested over Friday's bomb attack on a London underground train that injured 30 people, police said on Sunday, as Britain remained on its highest level of alert with soldiers helping provide security.