London police arrested 139 people on Saturday at a protest outside the US Embassy in support of the banned group Palestine Action, up from the 48 detentions announced earlier at the same rally.

The majority of those taken into custody had expressed support for a proscribed organization, London’s Metropolitan Police said in a statement cited by AP News. Al Jazeera reported at least 139 arrests after protesters defied a warning not to attend the rally against the proscription of Palestine Action.