The Metropolitan Police has said 890 people were arrested at a protest against the banning of Palestine Action as a terror group on Saturday - including 17 on suspicion of assaulting officers.
A total of 857 individuals were arrested in Parliament Square in London under the Terrorism Act 2000 over alleged offences, the force said.
It added that a further 33 were arrested for other offences, with 17 of those detained on suspicion of assaulting officers. The Met Police did not say what the other 16 arrests were for.
Deputy Assistant Commissioner Claire Smart, who led the policing operation, thanked Met Police officers for their "professionalism and tireless work despite the level of abuse that they faced".
Ms Smart said: "The violence we encountered during the operation was coordinated and carried out by a group of people, many wearing masks to conceal their identity, intent on creating as much disorder as possible.
"Many of those individuals have now been arrested and we have begun securing charges."
Defend Our Juries, which organised the demonstrations, insisted the rally was "the picture of peaceful protest".
news.sky.com
A total of 857 individuals were arrested in Parliament Square in London under the Terrorism Act 2000 over alleged offences, the force said.
It added that a further 33 were arrested for other offences, with 17 of those detained on suspicion of assaulting officers. The Met Police did not say what the other 16 arrests were for.
Deputy Assistant Commissioner Claire Smart, who led the policing operation, thanked Met Police officers for their "professionalism and tireless work despite the level of abuse that they faced".
Ms Smart said: "The violence we encountered during the operation was coordinated and carried out by a group of people, many wearing masks to conceal their identity, intent on creating as much disorder as possible.
"Many of those individuals have now been arrested and we have begun securing charges."
Defend Our Juries, which organised the demonstrations, insisted the rally was "the picture of peaceful protest".

890 people arrested at Palestine Action protest - including 17 on suspicion of assaulting police officers
A total of 857 individuals were arrested under the Terrorism Act 2000 over alleged offences, while 33 people were detained for other offences.