A fourth inquiry has been launched into claims of police brutality during the G20 protests.
Officials at the Independent Police Complaints Commission said a woman has claimed she was assaulted while held in a crowd by officers in a technique known as "kettling".
The alleged incident took place when police contained a group in an alleyway connecting Bishopsgate and Great St Helen's on 1 April.
Officials are also investigating the death of newspaper seller Ian Tomlinson, 47, after he was apparently hit with a baton and pushed to the ground.
The two other IPCC probes centre on an incident in which protester Nicola Fisher was slapped across the face and the alleged assault of a 22-year-old woman.
A total of 131 complaints have been forwarded to the Met. So far, IPCC officials are examining 52 of these cases.
Reader views (2)
Rosie, I have enough principals to go on the street and demonstrate about things I care about, and as a result I have been assaulted.
Also a friend of mine was killed by a policeman for no reason.
I hope you suffer such treatment some time, it will make you a better and less ignorant person.
Love Clive.
- Clive Pritchard, brighton UK
I hope those tree huggers who make false allegations are prosecuted too.
- Rosie, Watford
Tonight:
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