British police arrest second man over London train bomb

By Paul SandleLONDON (Reuters) - 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.The 21-year-old man was detained under Britain's Terrorism Act in the west London suburb of Hounslow just before midnight on Saturday, the Metropolitan Police said in a statement.Police arrested an 18-year-old man in the port of Dover earlier o