BOUREIMA BALIMA A vehicle belonging to Niger's electoral commission struck a landmine in the southwest of the country during yesterday's presidential election, killing seven people and seriously wounding three more, a local commission official told Reuters. Harouna Mounkaila, the vice president of the commission's local branch, said the incident took place in the rural commune of Dargol in the Tillabery region. Niger voted yesterday in the second round of a presidential election that is expected to usher in the first democratic transition of power since independence from France in 1960. Ruling party candidate Mohamed Bazoum is the favourite after leading…