Violence broke out at a “peace march” on the NATO headquarters in Brussels, Belgium that resulted in over 480 arrests Sunday. The protest, called “NATO Game Over”, was organized by a Belgian group called Action for Peace to protest what activists see as the transformation of NATO into a “military intervention apparatus”. No protesters entered the headquarters, according to authorities, who also said that they expected they’d release all protesters later in the evening.

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This protest is likely tied to another protest planned for the NATO leadership summit scheduled for late May for which protesters have been denied a permit.