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.

Police in London have arrested at least 150 people for intentionally violating a new law banning support for a pro-Palestinian group. Backers of Palestine Action have staged a series of protests across the U.

Hundreds arrested in London as pro-Palestinian group supporters deliberately defy new ban to challenge free speech limits.