Belgium Prime Minister Charles Michel said that Brussels will remain at the highest possible level of security alert on Monday, due to fear of a possible Paris-like attack on the city.
After meeting the National Security Council to review the situation, Michel said that the threat on the city, which hosts EU and NATO headquarters, was being considered 'serious and imminent'.
The city's metro service and schools will remain closed today after the authorities raised the alert level from three to four yesterday.
The streets in the city bore a deserted look as security forces patrolled everywhere in Brussels following the alert.
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On Saturday, a man from Belgium was detained in Antalaya, Turkey, over suspicion of him being involved in last week's terror strike in Paris, France, which left around 130 people dead.
Reports say that the arrested individual, Ahmet Dahmani, allegedly scouted target sites for the Paris attacks. He was arrested along with two Syrian nationals from a hotel in Antalya.
Belgium has been the centre of the Paris attack investigations after it emerged that two of the suicide bombers involved in the attacks had been living in the country.
