Not something I expected to read about in this day and age. Reminds me of the old dojo wars.
http://news.asiaone.com/News/AsiaOne+News/Crime/Story/A1Story20120304-331553.html
http://news.asiaone.com/News/AsiaOne+News/Crime/Story/A1Story20120304-331553.html
NGAWI, EAST JAVA: Ngawi Police precinct officers are in the process of gathering information linked to the attack by an unidentified group in ninja-like attire on teenage members of the Kera Sakti Indonesia silat (traditional martial art) school in Ngawi, East Java, on Sunday morning.