Neither Belgium nor Greece confirms whether the probe involves a jihadi cell in Verviers . The Belgian federal prosecutor's office said it was investigating an alleged plot to attack police officers and soldiers with explosives. Up to 20 sleeper cells could be set to strike in France , Germany , Belgium and the Netherlands .
Neither Belgium nor Greece confirms whether the probe involves a jihadi cell in Verviers . Source : Up to 20 sleeper cells could be set to strike in France , Germany , Belgium and the Netherlands .