The accident at Brussels's outer ring in Dilbeck caused four queues and a delay of more than an hour, the Flemish Traffic Center (Vlaams Werkzeckentrum) reported.
The three traffic lanes have been immobilized. This accident involves three cars and two trucks. Drivers can drive on a parallel path, but crossing is particularly difficult.
The lines have been formed for more than an hour and the situation is not ready to improve, the Flemish Center said without further details.
Three vehicles must be evacuated and assistance is in place. It is advisable to avoid the area and to borrow the inner ring.