Soldiers and police could be seen taking part in the operation near a busy motorway in Courtrai in northwestern Belgium, the latest in a series of raids since the Paris and Brussels terror attacks exposed a tangled web of cross-border jihadist cells.
The sole surviving suspect of the November 13 Paris attacks in which 130 people were killed, Salah Abdeslam was arrested in Brussels on March 18 after four months on the run.
"I can confirm that Salah Abdeslam wants to be handed over to the French authorities," lawyer Cedric Moisse told reporters at an extradition hearing in Brussels. "I can also confirm that he wants to cooperate with the French authorities."
A prosecutor was set to travel to the prison in the city of Bruges where Abdeslam is being held to discuss his extradition under a European arrest warrant.
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A judge is set to rule on the extradition by tomorrow at the latest.
Belgium has increasingly found itself at the centre of Europe's battle against terrorism and authorities have faced strong criticism for not doing enough to keep tabs on suspected extremists.
Its latest raid was linked to a new plot in France, in which the main suspect, Reda Kriket, was charged in France yesterday with membership of a terrorist organisation after police found an arsenal of weapons and explosives at his home.
In what could signal improved security cooperation, several European countries have made arrests in recent days over the thwarted plot linked to 34-year-old Kriket.
Kriket was himself arrested near Paris last week and a police raid on his apartment netted a cache of assault rifles, handguns and TATP, the highly volatile homemade explosive favoured by IS jihadists.
Another French suspect, 32-year-old Anis Bahri, was arrested in Rotterdam in the Netherlands at the weekend in connection with the plot.