The Brussels suburb of Saint-Gilles was closed off last night (local time) after two explosions were heard.
The explosions appeared to have been caused by a number of cars that were ablaze in a residential area.
(Google Maps)
There are no official reports yet of what caused the fire or whether it is part of a terrorist attack.
The city is still on edge following the terrorist bombings in March that claimed the lives of 32 people.
Pictures of the chaos have emerged on social media.
Newshub.
