A feminist campaigner from north London - subjected to rape and death threats on Twitter - has deleted her account. It comes a day after Caroline Criado-Perez raised concerns about the police investigation into abuse.
A spokesman for the Metropolitan Police said:
We are urgently trying to contact the complainant so we can discuss with her the issues that she is raising on social network sites, to once again explain our approach and tactics in this investigation to provide both answers for her and clarity.
A huge amount of evidence, including hundreds of tweets, has been captured by officers and thoroughly examined. This has been a complex and large investigation that has involved the examination of hundreds of messages sent on Twitter.
A number of people have so far been arrested in connection with the complaint, and remain on bail.
The MPS has worked closely with the CPS to ensure that what we are examining and highlighting for prosecution meets a criminal threshold. Officers have been in ongoing dialogue with the complainant since the investigation started. We are mindful of the truly hurtful and distressing impact that receiving such communication can have, however we must be sure to focus our efforts on the things that we and the CPS believe is a crime and can be prosecuted.
Caroline Criado-Perez said:
It's just appalling. I got an email saying 'why don't you go through what you've had' from three users with certain handles. It just shows such insensitivity to someone who's been through so much, I can't believe it. I've spent the afternoon crying just from the sheer awfulness of it.
They wanted me to go through all the Tweets again because of their incompetence. Every time I have to go through it it's reliving it all over again.
A feminist campaigner who was sent a barrage of abusive messages on Twitter, has claimed that police lost evidence that she handed to them.
Caroline Criado-Perez, from north London, was one of a number of women who received deaths threats - and threats of sexual abuse - on the social networking site, after campaigning to have a woman's picture printed on a new banknote.
She says that the police appear to have lost supporting evidence that she had emailed to them.