The raids follow on from yesterday's operation when a score of people were detained in as many raids.
Those detained today are being questioned. A number are expected to appear before an examining magistrate.
Belgian police on Monday launched a massive operation targeting people involved in the recruitment of fighters for the Syrian civil war. Across Belgium twenty premises were raided. A score of people were lifted from their beds and detained.
The operation led by the federal public prosecutor's office centred on Brussels including the borough of Sint-Jans-Molenbeek, but people suspected of recruiting fighters for Syria elsewhere in the country too were detained. In all ten people were arrested. The others were released on conditions or didn't have to appear before an examining magistrate after being questioned by police.
This is the second big operation against the recruitment of Syria fighters. Some 150 detectives took part. Prosecutors are understood to possess sufficient evidence that the suspects who were arrested were involved in recruitment to allow a prosecution to proceed. The suspects will probably appear before a judge on Friday.
Federal public prosecutors remained tight-lipped about the investigation and the weight of evidence against the suspects. Seven suspects were released after they were questioned by the police. Three others were freed under conditions.