crackdown

ratsia, tehoisku Abruptly stern measures or disciplinary action; increased enforcement
2013 June 18, w:Simon Romero|Simon Romero, "http://www.nytimes.com/2013/06/19/world/americas/brazilian-leaders-brace-for-more-protests.html Protests Widen as Brazilians Chide Leaders," New York Times (retrieved 21 June 2013):

After a harsh police crackdown last week fueled anger and swelled protests, President Dilma Rousseff, a former guerrilla who was imprisoned under the dictatorship and has now become the target of pointed criticism herself, tried to appease dissenters by embracing their cause on Tuesday.