A military-enforced lockdown in the Belgian capital Brussels has provoked scenes reminiscent of a Hollywood disaster movie as heavily-armed troops guard the city's prestigious institutions.
While the city endures a fourth day of disruption, schools and the underground network remain closed and more than 1,000 security personnel have been deployed.
Streets lie empty, soldiers roam purposefully, and citizens are advised to remain vigilant as the "imminent" terror threat continues.
Soldiers stand guard in the city on Monday night
On Monday, Belgian police launched more raids in Brussels and beyond, detaining five more people as they continued their hunt for a fugitive suspect in the Paris attacks.
The raids began late on Sunday, capping a tense weekend that saw hundreds of troops patrolling and authorities hunting for one or more suspected extremists including Salah Abdeslam, a fugitive since being named a suspect in the Paris attacks. Between Sunday night and midday Monday, 21 people were detained.
Police fired two shots at a car that approached them as they searched a snack bar in Molenbeek, Van Der Sypt said. The vehicle escaped but was stopped later in Brussels, and a wounded person inside was arrested. It was not immediately known if the person was linked to the investigation into the Paris attacks
A soldier takes his position at the hospital Cliniques Universitaires Saint-Luc on Tuesday morning
Several of the Paris attackers had lived in Brussels, including Abdelhamid Abaaoud, the plot's ringleader who was killed Wednesday in a standoff with French police.
One event set to go ahead in Belgium is the Davis Cup tennis final in Ghent, about 35 miles from Brussels. Belgium host the Andy Murray-led British team in the three-day final, beginning on Friday.
Brussels on Lockdown
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A general view of Gare Du Midi Metro Station which is currently closed due to the current terror threat on Tuesday Nov. 24. (credit:Ben Pruchnie via Getty Images)
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A Belgian police officer guards the building of the European Commission in Brussels, Belgium, Tuesday, Nov. 24. (credit:ASSOCIATED PRESS)
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The entrance of a subway station is closed in Brussels, Belgium, Tuesday, Nov. 24, 2015. (credit:ASSOCIATED PRESS)
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Armed soldiers and police patrol the streets at night near Grand Place square in Brussels, Belgium, on Monday, Nov. 23, 2015. (credit:Bloomberg via Getty Images)
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A children's playground and park are empty in the European Quarter of Brussels on Monday, Nov. 23. (AP Photo/Virginia Mayo) (credit:ASSOCIATED PRESS)
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A view from empty subway entrance, in Brussels where all stores had to close following the terror alert level being elevated to 4, in Brussels, Belgium, on Monday, Nov. 23. (credit:Anadolu Agency via Getty Images)
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A view from central train station, in Brussels where all stores had to close following the terror alert level being elevated to 4, in Brussels, Belgium, on Monday Nov. 23. (credit:Anadolu Agency via Getty Images)
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A man walks by an armoured vehicle as the Belgian capital remains on the highest possible alert level, in Brussels on Monday, Nov 23. (credit:EMMANUEL DUNAND via Getty Images)
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Soldiers patrol in an empty shopping galery as the Belgian capital remains on the highest possible alert level, in Brussels on Monday Nov. 23. (credit:EMMANUEL DUNAND via Getty Images)
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A soldier patrols in an empty shopping galery as the Belgian capital remains on the highest possible alert level, in Brussels on Monday, Nov. 23. (credit:EMMANUEL DUNAND via Getty Images)
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Belgian troops patrol a street in Brussels on Monday, Nov 23. (credit:EMMANUEL DUNAND via Getty Images)
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A shopkeeper looks out at an empty terrace near the historical Grand Place in the center of Brussels on Monday, Nov. 23. (credit:ASSOCIATED PRESS)
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A Belgian policeman and a soldier stand guard outside the central station in Brussels on Monday, Nov 23. (credit:ERIC LALMAND via Getty Images)
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Asylum seekers queue in front of the commissioner general for refugees and stateless persons' office, which is closed because of the threat level 4, as a military vehicle drives past. (credit:DIRK WAEM via Getty Images)
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Two Belgian soldiers and a policeman patrol in Brussels on Monday, Nov 23. (credit:EMMANUEL DUNAND via Getty Images)
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A woman walks past a closed subway station outside EU headquarters in Brussels on Monday, Nov. 23. (credit:ASSOCIATED PRESS)
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Belgian Army soldiers patrol outside the EU Council building in Brussels on Monday, Nov. 23. (credit:ASSOCIATED PRESS)
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Belgian Army soldiers patrol outside EU headquarters in Brussels on Monday, Nov. 23. (credit:ASSOCIATED PRESS)
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Belgian Army soldiers patrol outside EU headquarters in Brussels on Monday, Nov. 23. (credit:ASSOCIATED PRESS)
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Belgian Army soldiers patrol outside EU headquarters in Brussels on Monday, Nov. 23. (credit:ASSOCIATED PRESS)
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A man cycles by Belgian Army vehicle parked in front of the main train station in the center of Brussels on Sunday, Nov. 22. (credit:ASSOCIATED PRESS)
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Belgian Army soldiers patrol near Christmas huts in front of the old Brussels' stock exchange on Sunday, Nov. 22. (credit:ASSOCIATED PRESS)
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Two tourists walk in a deserted street towards the main train station in the center of Brussels on Sunday, Nov. 22. (credit:ASSOCIATED PRESS)
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People walk past an armoured personnel carrier in Brussels on Monday, Nov 23. (credit:EMMANUEL DUNAND via Getty Images)
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Two Belgian soldiers and a policeman patrol in Brussels on Monday Nov 23, 2015 as the Belgian capital remains on the highest possible alert level. (credit:EMMANUEL DUNAND via Getty Images)
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A woman walks past an armoured personnel carrier at Grand Place central square in Brussels on Monday, Nov 23. (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images) (credit:EMMANUEL DUNAND via Getty Images)
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A woman walks past an armoured personnel carrier in Brussels on Monday, Nov 23. (credit:EMMANUEL DUNAND via Getty Images)
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Soldiers stand guard in front of the Brussels Central Train Station on November 22, 2015 as the Belgian capital remained on the highest security alert level over fears of a Paris-style attack. AFP PHOTO / Emmanuel Dunand (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images) (credit:EMMANUEL DUNAND via Getty Images)
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Soldiers stand guard in front of the central train station on November 22, 2015 in Brussels, as the Belgian capital remained on the highest security alert level over fears of a Paris-style attack. AFP PHOTO / Emmanuel Dunand (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images) (credit:EMMANUEL DUNAND via Getty Images)
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Police stand guard on a security perimeter, as a reported police intervention takes place, in Brussels on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks, the Belgian prime minister said. Belgian police have launched several operations linked to the 'terrorist threat' facing Brussels, which is under a top security alert over fears of Paris-style attacks, a spokesman said. AFP PHOTO / BELGA / LAURIE DIEFFEMBACQ==BELGIUM OUT== (Photo credit should read LAURIE DIEFFEMBACQ/AFP/Getty Images) (credit:LAURIE DIEFFEMBACQ via Getty Images)
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Belgian police officers and soldiers secure an area as a reported police intervention takes place around the Grand Place central square in Brussels on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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A Belgian police officer talks to a driver as they block a road leading to the city center during an operation in Brussels, Belgium, on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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A Belgian soldier stands guard in front of Radisson Blu Hotel as a reported police intervention takes place around the Grand Place central square in Brussels on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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Belgian Army soldiers patrol outside EU headquarters in Brussels on Monday, Nov. 23, 2015. The Belgian capital Brussels has entered its third day of lockdown, with schools and underground transport shut and more than 1,000 security personnel deployed across the country. (AP Photo/Virginia Mayo) (credit:ASSOCIATED PRESS)
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A Belgian Army truck and Belgian police are stationed outside EU headquarters in Brussels on Monday, Nov. 23, 2015. The Belgian capital Brussels has entered its third day of lockdown, with schools and underground transport shut and more than 1,000 security personnel deployed across the country. (AP Photo/Virginia Mayo) (credit:ASSOCIATED PRESS)
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A Belgian police officer with a gun in his hand walks past a car as they block a road leading to the city center during an operation in Brussels, Belgium, on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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A Belgian soldier stands guard in front of Radisson Blu Hotel as a reported police intervention takes place around the Grand Place central square in Brussels on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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A reported police intervention takes place around the Grand Place central square in Brussels on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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Belgian police officers secure an area as a reported police intervention takes place around the Grand Place central square in Brussels on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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A Belgian soldier stands guard in front of Radisson Blu Hotel as a reported police intervention takes place around the Grand Place central square in Brussels on November 22, 2015. Brussels will remain at the highest possible alert level with schools and metros closed over a 'serious and imminent' security threat in the wake of the Paris attacks. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
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A Belgian Army soldier patrols on a main boulevard in Brussels, Sunday, Nov. 22, 2015. Western leaders stepped up the rhetoric against the Islamic State group on Sunday as residents of the Belgian capital awoke to largely empty streets and the city entered its second day under the highest threat level. With a menace of Paris-style attacks against Brussels and a missing suspect in the deadly Nov. 13 attacks in France last spotted crossing into Belgium, the city kept subways and underground trams closed for a second day. (AP Photo/Geert Vanden Wijngaert) (credit:ASSOCIATED PRESS)
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Police patrol during an operation in the center of Brussels on Sunday, Nov. 22, 2015. Western leaders stepped up the rhetoric against the Islamic State group on Sunday as residents of the Belgian capital awoke to largely empty streets and the city entered its second day under the highest threat level. With a menace of Paris-style attacks against Brussels and a missing suspect in the deadly Nov. 13 attacks in France last spotted crossing into Belgium, the city kept subways and underground trams closed for a second day. (AP Photo/Virginia Mayo) (credit:ASSOCIATED PRESS)
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Police patrol during an operation in the center of Brussels on Sunday, Nov. 22, 2015. Western leaders stepped up the rhetoric against the Islamic State group on Sunday as residents of the Belgian capital awoke to largely empty streets and the city entered its second day under the highest threat level. With a menace of Paris-style attacks against Brussels and a missing suspect in the deadly Nov. 13 attacks in France last spotted crossing into Belgium, the city kept subways and underground trams closed for a second day. (AP Photo/Virginia Mayo) (credit:ASSOCIATED PRESS)
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A Belgian Army soldier and policeman patrol on a main boulevard in Brussels, Sunday, Nov. 22, 2015. Western leaders stepped up the rhetoric against the Islamic State group on Sunday as residents of the Belgian capital awoke to largely empty streets and the city entered its second day under the highest threat level. With a menace of Paris-style attacks against Brussels and a missing suspect in the deadly Nov. 13 attacks in France last spotted crossing into Belgium, the city kept subways and underground trams closed for a second day. (AP Photo/Geert Vanden Wijngaert) (credit:ASSOCIATED PRESS)
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Police closes streets near the Grand Place in Brussels on Sunday, Nov. 22, 2015. Western leaders stepped up the rhetoric against the Islamic State group on Sunday as residents of the Belgian capital awoke to largely empty streets and the city entered its second day under the highest threat level. With a menace of Paris-style attacks against Brussels and a missing suspect in the deadly Nov. 13 attacks in France last spotted crossing into Belgium, the city kept subways and underground trams closed for a second day. (AP Photo/Geert Vanden Wijngaert) (credit:ASSOCIATED PRESS)
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An armed soldier stands guard over Stadhuis Van Brussel in Grote Markt on November 23, 2015 in Brussels, Belgium. Security has been tightened in the nation's capital after police arrested sixteen suspected terrorists during more than 22 anti-terror raids around the city yesterday. (Photo by Ben Pruchnie/Getty Images) (credit:Ben Pruchnie via Getty Images)