London police arrest second man over bomb attack on Tube
21-year-old held in connection with incident on underground train that left 30 injured
UK police and forensic officers are taking part in an operation in Cavendish Road, Sunbury-on-Thames, Surrey, as part of the investigation into the Parsons Green bombing. Video: Reuters
A second man has been arrested over Friday’s bombing of a London commuter train that injured 30 people and Britain remained on its highest level of alert on Sunday with soldiers helping provide security.