Police searched two homes in the Haren and Schaarbeek districts of Brussels and another in the city of Liege in the French-speaking Wallonia region, the office said in a statement.
"Two persons were arrested and will be interrogated by the investigators," it said, adding a judge will decide later whether or not to detain the pair further.
A judge specialising in terrorism cases ordered the raids "in connection with an ongoing federal investigation into the activities of a terrorist group," the statement said without elaborating.
The man has been active in a chat group on the encrypted Telegram app where he "apparently indicated he was preparing to carry out an attack," RTBF reported without naming its sources.
The suspect had in the past been linked to criminal but not terrorist activities, it added.
The authorities were now trying to determine if there are links between the recently arrested users of Telegram in France and the man detained in Belgium on Friday, RTBF reported.
On Wednesday, a teenager was arrested in a dawn raid on his home in northeastern Paris during an investigation into the network of French extremist Rachid Kassim, with whom he had allegedly been in touch on Telegram about carrying out a terrorist act.
Jihadists linked to the Paris cell then allegedly carried out the March 22 suicide bombings in Brussels that killed 32 people at the main airport and a metro station near the EU headquarters.
Both sets of attacks were claimed by the Islamic State group.
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
