Belgian police have made 16 arrests in anti-terror raids, but suspected Paris attacks gunman Salah Abdeslam remains at large, the authorities have said.
Some 22 raids were carried out Sunday across Brussels and Charleroi, the federal prosecutor's spokesman said.
Brussels remains on the highest level of terror alert. Universities, schools and the metro system will stay closed on Monday.
More than 130 died and 350 were injured in the Paris attacks 10 days ago.
Police fired two shots at a car during an operation in the Brussels district of Molenbeek, injuring one suspect who was later arrested.
No weapons or explosives were found during the searches on Sunday, spokesman Eric Van Der Sypt told a news conference. READ MORE OF THIS STORY ON BBC NEWS ONLINE