Police said the pair were detained after two pro-Palestinian groups alleged they had been waving flags from their army brigade.

Belgium's Tomorrowland, one of the world's largest electronic music festivals, opened its doors as planned on Friday, after the event was thrown into doubt by a fire that destroyed its main stage. After fire authorities and the police deemed it safe,

Fans roared in excitement and organizers sighed with relief as the Tomorrowland music festival kicked off Friday — two days after a massive fire engulfed the main stage and threw one of Europe's biggest summer concert events into doubt.