Police have detained eight people during investigations into an alleged plot to commit "terrorist attacks" in Belgium, the federal prosecutor's office said Tuesday.
Raids were conducted late Monday on homes in the capital Brussels, the port city of Antwerp and the border town of Eupen, the statement said.
A judicial source told AFP those arrested "were very young radicalized people" suspected of belonging to a militant movement.
The prosecutor's statement cited two inquiries, one led by federal police in Brussels and the other by an investigating magistrate in Antwerp.
Both led to house raids on Monday, and the statement said: "There are links between the two files, but further research will have to show to what extent the two groups were intertwined."
The statement said at least five of those detained were suspected of planning to "commit a terrorist attack in Belgium."