London police carry out more raids in connection with their investigation into Saturday's attack that killed seven people and wounded more than 50 others.
London Bridge Attack Aftermath
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People attend a vigil to remember the victims of the attack on London Bridge and Borough Market, at Potters Field Park, in central London, Britain, June 5, 2017.
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Armed police officers stand near the site where attackers crashed their van after running over pedestrians on London Bridge, next to Borough Market in central London, June 5, 2017.
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Mayor of London Sadiq Khan, right, speaks during a media conference at London Bridge, June 5, 2017. Police arrested several people and are widening their investigation after a series of attacks in the heart of London on Saturday.
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Forensic police investigate around the Borough Market and London Bridge area of London, June 5, 2017.