Brussels in under lockdown tonight as police carry out operations across the city.
Speculation is rife on social media – but officials have warned Belgians and the press not to share any details about the operations on social media.
So now people are flooding Twitter with pictures of cats to confuse terrorists.
Armed forces swooped on the Belgian capital earlier this evening, guarding hotels and telling locals to stay inside, according to local reports.
Guests at the Radisson Blu were reportedly told to stay inside as the hotel came under heavy guard.
Soldiers were pictured surrounding the building this evening.
A spokesperson for the hotel told DeMorgen: ‘There is no imminent threat, but we want our guests to keep as safe as possible.’
The alert comes after ten jihadists attacked a Radisson Blu hotel in Mali and held around 170 people hostage.
At least 27 people were killed in the raid.
It has since emerged that the terrorists were hunting members of an Air France crew which were believed to have been staying there at the time.
Soldiers from the presidential guard patrol outside the Radisson Blu hotel in Bamako, Mali (Picture: AP Photo/Jerome Delay)
Brussels has endured a heightened terror alert since the Paris atrocities.
It will see Brussels in lock-down for a third day as the international community prepares to intensify action against Islamic State.
Belgian prime minister Charles Michel said schools, universities and the underground system would have to remain closed tomorrow amid fears of a repeat of the simultaneous gun and bomb attacks in the French capital.
Key suspect Salah Abdeslam is just one of several feared to be at large in the city, where the usually thronged streets have been eerily quiet.