A campaign group has said five of its spokespeople have been arrested by counter-terror police as it prepared to announce further protests against the Palestine Action ban.
Defend Our Juries said it still expected more than 1,000 protesters to gather on Saturday in London, with signs declaring "I oppose genocide. I support Palestine Action".
The group added that the dawn arrests, made hours before a media conference announcing more demonstrations, were an "unprecedented assault on free speech".
The Metropolitan Police confirmed the arrests had been made as part of an ongoing investigation into people suspected to be "involved in encouraging support for the proscribed group Palestine Action".
The force said among those arrested were two men aged 26 and 55, and a 61-year-old woman in London, a 48-year-old woman in Kendal, Cumbria, and a 39-year-old man in Barnsley, South Yorkshire.
