A 21-year-old man has been arrested in Manchester on suspicion of harassment offences after feminist campaigner Caroline Criado-Perez was targeted on Twitter.
Scotland Yard confirmed the arrest is in connection with an allegation of malicious communications received by officers in London on Thursday.
Ms Criado-Perez, who successfully campaigned for the Bath author Jane Austen's picture to be put on a new bank note, has received a deluge of threats from various sources on the microblogging site.
Twitter has faced calls to take faster and stronger action against online abuse in the wake of the incident.
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