An ethnically-diverse Berlin neighbourhood has been rocked by two nights of rioting by radical left wingers, with a city official calling the attacks acts of “terrorism”. Up to 100 masked leftist political actors set cars alight and threw stones in Neukölln, one of Berlin’s most diverse district over the course of Friday and Saturday night. Elsewhere in the city some 4,000 hardened leftists staged a protest against the police and officers are now looking into links between the two events, reports Deutsche Welle. It is thought the attacks, which saw 28 cars burned and police pelted with rocks were conceived as revenge for a police operation three weekends ago when 500 officers stormed an “anarchist” squat in east Berlin, reports Die Welt. The squat had been linked to a number of crimes in the area including an officer being jumped and beaten by a number of youths. Stadtteil Neukölln: Bis zu 100 Maskierte demolieren 20 Autos in Berlin https://t.co/yuqGm1fiqO pic.twitter.com/sY6kIRgWJ1 — DIE WELT (@welt) February 7, 2016 When officers stormed the building they found a large number of what they deemed potentially dangerous items including a shopping trolley full of half-bricks and large quantities of nails. The raid was conducted without a warrant and so