Long-standing antagonism between Prime Minister Sheikh Hasina Wajed's Awami League and the opposition Bangladesh National Party—what critics call “zero-sum politics”—set off street violence that threatened the safety of journalists. A constitutional amendment eliminated the creation of caretaker governments to oversee general elections, a step likely to intensify political passions surrounding the scheduled 2013 vote. The Bangladesh National Party called for political agitation and suggested it may boycott the election. The amendment also criminalized criticism of the constitution itself, labeling such dissent as sedition. A group of machete-wielding assailants killed Jamal Uddin, a reporter who covered the drug trade for a Bengali-language newspaper in Jessore district. The June slaying ended a nearly seven-year period in which no Bangladeshi journalist had been killed in direct relation to journalism. Mystery surrounded the double murder of married journalists Meherun Runi and Golam Mustofa Sarowar. The authorities made arrests in the case but disclosed no motive. CPJ is investigating to determine whether the double slaying was work-related.