Police arrested almost 900 people at a demonstration in support of Palestine Action in the United Kingdom, in the latest round of detentions of its supporters since the pro-Palestinian group was banned by the government as a “terrorist” organisation, Aljazeera reported.

Police arrested 857 people for showing support for a proscribed group, while 33 people were arrested for other offences, including 17 for assaults on police officers, the Metropolitan police said on Sunday, according to Aljazeera.

Defend Our Juries, the organising campaign, estimated 1,500 people joined the London demonstration on Saturday, assembling with placards stating “I oppose genocide, I support Palestine Action”.