Protesters clashed with police during the G20 summit
A total of 145 complaints have been made following clashes between police and protesters at the G20 summit.
They include 70 claims of excessive force by alleged victims or witnesses to brutality, the Independent Police Complaints Commission (IPCC) said.
Forty concern police tactics during the City of London protests, including the corralling technique called "kettling".
Government inspectors have been brought in after two alleged assaults by police during the protests earlier this month.
Newspaper vendor Ian Tomlinson suffered a fatal heart attack on 1 April minutes after coming in contact with a police officer who was seen shoving the 47-year-old to the ground in video footage.
On Tuesday new footage emerged of another officer seen hitting Nicky Fisher, 35, from Brighton, East Sussex, in the face with his hand and on her leg with his baton after allegedly being sworn at on 2 April.
Two officers from the Metropolitan Police territorial support group have been suspended in connection with the incidents and the IPCC is examining the footage.
One of the 145 complainants was 21-year-old student Tom Hibbins, from Brockley, south-east London.
Mr Hibbins said he was unable to escape as the police line pressed forward outside the Bank of England, and that he was hit with a metal baton and kicked in the groin by police.
He said: "It seems to me inevitable that the tactics used by police on that day would inevitably agitate people and lead to trouble."
Mr Hibbins added: "Such conditions breed hostility, on both sides, as seems to be evident with the assault on Ian Tomlinson."
Greg Foxsmith, 41, a councillor in Islington, north London, said he was pushed to the floor by an officer who allegedly hit an elderly man with a baton.
'Many similar incidents'
"I only got as far as saying 'excuse me' when I was pushed in the chest and fell over myself, so I did not get his name," Mr Foxsmith said.
"At the time I thought it was an isolated incident but it seems that actually there were many similar incidents and I realised my experience was not exactly unique."
The IPCC said that a further 40 complaints would not be investigated because they did not qualify under the Police Reform Act. Many of these were made by people who saw footage of the protests on television.
On Wednesday Metropolitan Police Commissioner Sir Paul Stephenson asked Her Majesty's Chief Inspector of Constabulary to review policing tactics after the operation.