English: Armenian parliamentary election, 2012 On May 4, the last official day of the campaign, during the Republican Party concert and rally in Republic Square of Yerevan, dozens of balloons filled with hydrogen blasted, resulting in injury of at least 144 people according to the Ministry of Emergency Situations. Few hours later it was reported that out of total 154 people hospitalized, 98 were still in hospitals and 28 were in intensive-care units.