Peter Nicholls | Reuters
A passenger sits on an underground train leaving Parson’s Green station after it reopened following an explosion on a rush hour train yesterday morning, in London, Britain, September 16, 2017.
A second man was arrested in the U.K. by detectives from the Metropolitan Police’s counter-terrorism command investigating the terrorist attack at the Parsons Green underground station.
The 21-year-old man was arrested in Hounslow, a borough in west London, late on Saturday local time, under section 41 of the Terrorism Act, the police said. He was taken to a south London police station and remains in custody.
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