Brussels is said to be like a scene from "one of those zombie apocalypse films" as the Belgian city goes into a second day of lockdown.
Schools will be closed on Monday, while the Metro underground system will also remain closed to the public, as the government warns of a "serious and imminent" threat of coordinated, multiple attacks.

"What we fear is an attack similar to the one in Paris, with several individuals who could also possibly launch several attacks at the same time in multiple locations," Michel told a press conference in Brussels.
The lockdown means many public events have been cancelled and public buildings closed.
"The big question now is what happens next."
The security alert has been elevated after fears one of the Paris attackers is in Brussels and may be planning a similar series of coordinated attacks.
Salah Abdeslam, 26, was driven back to Brussels in the early hours of the Saturday morning following the terror attacks in Paris on November 13.
His older brother, Brahim Abdeslam, 31, detonated a suicide vest outside the Comptoir Voltaire cafe, close to the Bataclan theatre where 89 people were killed.
"We know that Abdeslam was actually driven back to Brussels in the early hours of that Saturday morning after the attacks, and the two people who drove him are in police custody," Cendrowicz said.
"There are also reports that he was actually very disappointed that he couldn't blow himself up in Paris, he was very cross with himself, there might have been something which went wrong with his bomb.
"Whatever the case, there is the risk that he's here in Brussels and he's planning to do something and that's why the police are out in force and that's why they're cancelling all sorts of events."
People in Brussels were "very nervous", Cendrowicz said.
"A lot of the streets are quite quiet, there are some areas where there's still activity but, some areas. it's completely deserted. It feels like one of these zombie apocalypse films, it's really eerie and strange."
The police and army presence in the city has been boosted during the lockdown, Reuters reported.
Belgium has been at the heart of investigations into the Paris attacks after links to Brussels, and the poor district of Molenbeek in particular, emerged, Reuters reported.