Police in Belgium have made 12 arrests in a huge anti-terrorism operation, nearly three months after the deadly bomb attacks on Brussels.
Those detained overnight are suspected of plotting a terrorist attack, prosecutors say. They were among 40 taken in for questioning.
Searches were conducted in 16 municipalities, mainly around Brussels, with checks on 152 lock-up garages.
PM Charles Michel said security would be stepped up at public events.
He tweeted (in French) after a meeting of the Belgian security council to say events would go ahead as planned.