Prosecutors say the investigation "necessitated an immediate intervention"
Twelve people suspected of planning fresh terror attacks have been arrested in Brussels as part of a major police operation.
The federal prosecutor's office says police raided about 40 houses and 152 garages across the country on Friday and Saturday.
It says an ongoing counter-terrorism investigation "necessitated an immediate intervention."
"Currently no further information can be given concerning the seized items or the identities of the arrested persons," the statement said.
"Until now, no arms or explosives were found."
According to Flemish broadcaster VTM, the people arrested were suspected of planning an attack this weekend during one of Belgium's football games in Euro 2016.
The tournament is taking place in France.
Ireland is set to play Belgium at 2.00pm today.
Belgium remains on the second highest terror alert in wake of the 22 March attacks on the Brussels subway and airport which left 32 people dead.
In November last year, 130 died during attacks in Paris.
Investigators have confirmed links between the perpetrators, some of whom were based in Belgium.