107 arsons have been aimed at schools in Malmö during the past six years. Not one person has been sentenced for the crimes (if the perp is under 15 years of age they automatically walks free- something that criminal- and other- gangs take advantage of).
For those of you who read Swedish, here is the link.
Firemen who try to put out the fires are often met with hail of stones by "youths". Police have to travel in twos- one patrol car just to protect the other when dismounted.