There were 890 people arrested at a demonstration against the ban on the group Palestine Action in London on Saturday, the Metropolitan Police say.

The majority of the arrests were for supporting a proscribed group under the Terrorism Act, while police said 17 were also arrested for assaults on police officers "after the protest turned violent".

But event organisers said protesters were "peacefully defying the ban" and accused the Met Police of making "false claims" about violence.

The government proscribed Palestine Action under anti-terrorism legislation in July, making membership of or support of the group a criminal offence, punishable by up to 14 years in prison.

The group was banned after activists broke into an RAF base and damaged two military aircraft earlier this year.

An estimated 1,500 took part in the protest in Parliament Square, Westminster, on Saturday.

The Met said 857 arrests were for showing support for Palestine Action, while 33 were arrested for other offences, including 17 for assaults on police officers.

The number of arrests at the demonstration has risen from the 425 announced on Saturday.

Home Secretary Shabana Mahmood said: "Supporting Palestine and supporting a proscribed terrorist group are not the same thing."

In a social media post, she added it was "an honour" to observe Saturday's policing operation on a visit to the Met's control room.

The Home Office said Mahmood, who became home secretary in a reshuffle on Friday, "backed officers for arresting those who support the proscribed terrorist group Palestine Action" on her visit.

The protest saw hundreds of people gather in central London before writing "I oppose genocide, I support Palestine Action" on placards at 13:00 BST. Officers began making arrests shortly after.

The Met said most were taken to custody as they refused to provide their details or were found to have been on bail.

Deputy assistant commissioner Claire 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.

Defend Our Juries, which organised the rally, said officers had "violently assault[ed] peaceful protesters including the elderly, in order to try and arrest over a thousand people for holding cardboard signs".

They said the demonstration showed the Palestine Action ban was "impossible to enforce and a preposterous waste of resources".

Protests against the ban would continue until it is lifted, they added.

The Met previously said the tactics used at the protest to "overwhelm the justice system... required significant resource which took officers out of neighbourhoods to the detriment of the Londoners who rely on them".

Earlier this week, the Home Office was given permission to challenge a ruling which allowed Palestine Action to appeal against its ban under terrorism legislation.

The group's co-founder, Huda Ammori, was granted permission to appeal in July after her lawyers argued the ban breached the right to free speech.

Former Home Secretary Yvette Cooper has previously defended the proscription by saying some supporters of Palestine Action "don't know the full nature" of the group.

On Sunday, Defence Secretary John Healey told Sky News he expected her successor Shabana Mahmood would be "just as tough" on Palestine Action supporters. (BBC)

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