After chanting "Allahu akbar", those gathered for Friday prayers at Brussels' Grand Mosque streamed outside to chant "Long Live Belgium," feeling the pressure to tackle radicalisation after the attacks on the city.

"The time has come to act," Imam Ndiaye Mouhameth Galaye told AFP ahead of his sermon. "Today we're launching a programme against radicalisation."

As the faithful arrived, the Belgian and European Union flags fluttered at the entrance to the city's main mosque, close by EU headquarters and several embassies.

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