Belgium police have arrested four suspected Islamic State recruiters who were allegedly plotting fresh terrorist attacks.
All four were charged with participating in the activities of a terrorist group.
Belgium prosecutors said evidence suggested they were planning further atrocities in the country but did not go into detail.
Searches were carried out in Antwerp and two other locations.
The prosecutors said some of those detained were planning to go to Syria or Libya and join IS.
All of the suspects are believed to have wanted to recruit people to go to those conflict zones, the statement said.
The statement said the suspects did not appear to have links to the suicide bombers who struck Brussels airport and a metro station in March, killing 32 people.
The attacks came a week after Salah Abdeslam, who allegedly helped carry out November's Paris attacks, was arrested.