Update: Police arrest 20-year-old man over London train bomb attack

Two other men, aged 25 and 30, who were arrested in Newport in Wales last week, are still being questioned.
Placed on a packed train during morning rush hour, the improvised device injured 30 people when it went off despite apparently malfunctioning.
The attack in Parsons Green, a quiet residential area, caused panic among commuters and some were hurt in a stampede as people fled the scene.
The Tube bombing was the fifth terror attack in Britain in sixth months — four of them in London and one in Manchester — with the bloodshed claiming 35 lives.