|The driver of the car is believed to have told police his vehicle was full of explosives|
Shots were fired after a high-speed chase through the suburb of Molenbeek.
The vehicle then reportedly got stuck in traffic, at which point it reversed into a police car.
Belgian broadcaster RTL quoted a police spokesman as saying: "We got the driver out, and he immediately told us that there were explosives inside."
The car is understood to be registered in Germany.
A bomb disposal squad are on the scene and are using a robotic bomb detector to search the vehicle.
Brussels has been on high alert since 32 people were killed in suicide attacks at the city's airport and a metro station in 2016.
Many suspects linked to those attacks, and the 2015 Paris terror attacks which left 129 people dead, lived or travelled through the district of Molenbeek.