The remains of an Audi sedan set afire by an arsonist recently in Zehlendorf district stands in a street where two more cars were torched on August 23, 2011 in Berlin, Germany. Police have so far made no arrests in a series of arson attacks that have destroyed at least 70 cars within the last week and show no signs of abating. In recent years several hundred cars have been torched annually and police suspect left-wing radicals. The recent series of attacks, averaging about 10 a day, has been particularly severe. (Photo by Sean Gallup/Getty Images)

An Opel car set afire by an arsonist recently in Zehlendorf district stands in a street where two more cars were torched on August 23, 2011 in Berlin, Germany. (Photo by Sean Gallup/Getty Images)