Over 400 people were arrested in London on Saturday for protesting the United Kingdom‘s decision to ban a pro-Palestinian group under an anti-terrorism law, according to British authorities. At least 466 people were arrested for backing the U.

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

Police in London braced for more demonstrations on Sunday as the war in Gaza continues to inflame tensions across the U.K.