The MIVB’s spokeswoman Françoise Ledune told the Brussels regional news platform Bruzz that no one was injured in the incident.
Initial findings of the investigation point to the youths having used a lighter and some petrol to start the fire. A carriage window exploded and the plastic and rubber around it melted produce a large amount of smoke. The damaged metro train was towed away to the depot.
MIVB intends to try and get the culprits prosecuted. The incident has already been reported to the police and they will examine images from security cameras that are in place on the platforms of Kruidtuin Metro Station.