Mass protest in Parliament Square expressed support for Palestine Action, which was proscribed under the Terrorism Act last month

London police said Sunday that 532 people were arrested the previous day when supporters of a pro-Palestinian group that was recently outlawed as a terrorist organization intentionally broke the law.

British police said they arrested 365 people in central London on Saturday as supporters of a recently banned pro-Palestinian group intentionally defied the law as part of their effort to force the government to reconsider the ban.