As Belgium remains on a high alert, the Police have arrested 16 people in several anti-terror raids.
However, suspected Paris attacks gunman Salah Abdeslam is still at large.
Officials say a total of 22 raids were carried out on Sunday across Brussels and Charleroi.
Brussels remains on the highest level of terror alert. Universities, schools and the metro system will stay closed on Monday.
More than 130 people died and 350 others were injured in the Paris attacks 10 days ago.
UK Prime Minister, David Cameron, is reported to be in Paris for talks with the French President, Francois Hollande, on co-operation in a fight against Islamic State (IS) group.
They visited the Bataclan concert hall where at least 89 people were killed.
The French government says the aircraft carrier, Charles de Gaulle, will be operational in the Mediterranean on Monday and ready to act against IS militants in Syria.