Three youngsters aged 12 and 13 were picked up for stoning four trains last week. The parents of one of them turned to the police after they questioned their son. The boy told police the names of his friends.
Originally police assumed the stoning was revenge for ticket checks that were conducted earlier that day, but it now seems to be simple vandalism.
The parents might end up paying for the damages, which could be pretty high, for the broken windows, the delay of about 45 trains, as well as psychological damages caused to the train drivers.
Source: HLN (Dutch), Brussel Nieuws (Dutch)
See also: Brussels: Shooting on trains