Second man arrested over London train attack - police
People speak with a police officer outside Parsons Green tube station in London, Britain September 15, 2017. - Photo Reuters/Kevin Coombs
A second man has been arrested by police investigating Friday's bomb attack on a London underground train, police said.
The 21-year-old man was arrested in the west London suburb of Hounslow just before midnight on Saturday, the Metropolitan Police force said in a statement.
He was detained under Britain's Terrorism Act and taken to a south London police station, the force added on Sunday.
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