The raids were not linked to the recent deadly militant attacks in Paris, prosecutors said.
The country will debate an anti-terror package next week as European countries step up their security.
The battle between jihadis and security forces in France may soon become brutal.
Anti-extremism thinktank warns of huge number of European jihadists returning home after fighting for ISIS.
There were arrests in Paris, Berlin, Belgium and Austria today after two were killed in a raid in Belgium last night.
Some Jewish schools in Belgium and the Netherlands were closed, reflecting a heightening tensions in Europe.
The siege ended about 1pm after three men surrendered themselves to polic
French, Italian and Belgian draft budgets for 2015 may be at risk of breaking rules says European Commission
No one in Flanders is old enough to remember the Great War, but no one seems quite able to forget, either.
On Friday, all three nations approved airstrikes and commited fighter planes in the struggle against the militant group
Belgian police confirm parts used in detonation devices are found in a flat rented by recently arrested Dutch couple, returning from Syria
Belgian lawmakers are set to let children decide whether they should die for their own good.