Police say 890 people were arrested at a demonstration in support of the banned group Palestine Action in London on Saturday.

The majority of the arrests were for supporting a proscribed group under the Terrorism Act, while the Metropolitan Police said there were also a “significant” number of arrests made “after the protest turned violent”.

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