Two security guards have been injured after an explosion outside the French embassy in Libya, reports Reuters.
A French embassy official told the news agency they believed the device was "a booby trapped car" and that "lots of damage" had been caused to the building.
Local residents say they heard two explosions early this morning.
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The annual event has earned a place in the record books ahead of the grand final of the 60th anniversary show in Austria this evening.
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.