BRUSSELS—Thousands of people marched in Brussels on Dec. 16 in opposition to a United Nations agreement aimed at fostering cooperation on migration, eclipsing a smaller demonstration in support of the deal, the signing of which brought down Belgium’s government last week.
Police said some 5,500 people marched in the bigger protest, organized by Flemish right-wing parties in the part of the capital where main European Union institutions are located. A separate counter-demonstration of about 1,000 people, organized by left-wing groups and nongovernmental organizations, took place in the city center.
