Up to 300 soldiers will be mobilised in Brussels, Antwerp and elsewhere.
Belgium's interior minister told the BBC that his country had to make use of all the forces at its disposal.
Europe is on high alert after Islamist gunmen killed 17 people in Paris. More than 20 people have been arrested in Belgium, France and Germany.
Uniformed soldiers could be seen outside Jewish schools and government buildings in Belgium on Saturday.
Defence ministry officials said 150 police were already in place, a number that they expected to double over the course of the coming week. » | Saturday, January 17, 2015
