Belgian police have detained 12 people overnight on suspicion of preparing new 'terror attacks' in the country.
Some 40 house searches were carried out, especially in Brussels.
No details have been released about the identities of those in custody or any items seized.
However no arms or explosives are said to have been recovered.
A total of 40 people were questioned by police amid the raids.
Daesh suicide bombings in Brussels in March killed 32 people at its airport and in a metro station.
