A group of people broke off from the demonstration against slavery in Libya before putting on masks and turning violent.
The incidents occurred in the busy commercial neighbourhood around Place Louise near the Belgian capital's city centre, police spokesman Ilse Van de Keere told AFP.
Brussels police posted on Twitter: "50 people (were) arrested and (there are) no injuries to be noted."
According to the RTBF public broadcaster, those arrested during the violence were aged between 15 and 18.
The US network CNN triggered a wave of condemnation when it aired footage last week of an apparent auction where black men were presented to North African buyers as potential farmhands and sold.
This is the third time that violence erupts in Brussels in a few weeks.
On November 15, an unauthorised rally organised by a young social media star escalated when the police tried to disperse the crowd.
Four days earlier, there was violence after Morocco's qualification for the 2018 football World Cup.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
