Two men suspected of planning an attack in Belgium have been detained by police, prosecutors say.
The men, named only as Nourredine H, 33, and his brother Hamza H, were arrested after a series of houses were searched on Friday evening.
Raids were carried out in the cities of Mons and Liège by federal police. No weapons or explosives were found.
The federal prosecution office said in a statement: “Based on provisional results from the investigation, it appears that there were plans to carry out an attack somewhere in Belgium.”
The French version of the statement referred to “planning attacks” in the plural.
A judge will decide whether they should be detained in custody beyond an initial 24 hours.
Thirty-two people were killed in March after assaults on Brussels Airport and a metro station.Belgium is on security alert three – out of four – meaning the threat is considered serious, possible and probable.
Last month, Belgian police received warning that a group of Islamic State fighters had recently left Syria and were heading to Europe to plan attacks in Belgium and France.
Security was increased for Belgium’s national day on 21 July following the truck attack in the French city of Nice that killed 84 people on Bastille Day.
There is currently no connection between the arrests and the March attacks, federal prosecutors said.
