Greek public sector workers say that they will stage a strike on Tuesday. The strike is over a government decision to ban strikes for high-school teachers. The government says that workers will be arrested if they go ahead with the strike. The teachers are expected to begin their own strike on Friday, during exams for high-school students.
See "Greek state workers to strike against teachers' walkout ban", Renee Maltezou, Reuters, May 12, 2013