What outlets write
Deutsche Welle (Deutsch) 10 October, 06:48 «After a series of knife attacks, fear of copycats is growing»
Der Spiegel 10 October, 13:08 «Violence by two young people in different places is ravaging Poland»
ntv 11 October, 11:54 «Within a few days, someone stabs at three Polish schools with a knife»
- ntv 11 October, 11:54
«Investigators target three groups of prominent teenagers in particular»