The three people shot dead inside a Jewish museum in Brussels were two women and a man, Ine Van Wymersch, a spokeswoman for the prosecutor's office has said.
It had earlier been reported the victims were two men and a woman. A fourth person is seriously injured.
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Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".
Some students argued that the centuries-old tradition of wearing gowns, suits and mortarboards to exams was 'archaic' and looked elitist.
Clear spells in the north overnight where it's actually cold enough in the north for a touch of ground frost. Further south cloudier.