Belgian anti-terror police have taken two people into custody in raids overnight.

Federal prosecutor's office spokesman Eric Van der Sypt said Saturday that the two were picked up in the eastern Belgian town of Verviers and Tournai, in the south.

He said that no weapons, explosives or other materials were found, but declined to say why the raids were conducted.

Van der Sypt said the raids had no connection to the March 22 attacks in Belgium that killed 32 people or the Paris massacres last November, which claimed 130 victims.