NEW : Electoral commission postpones voting in two states . While Saturday 's election was marred by violence , reports of underage voting and other logistical problems , observers considered it an improvement . The president tells protesters to avoid violence . Comment: Protesters in the mostly Muslim north charge the vote is rigged after Jonathan 's election .
NEW : Electoral commission postpones voting in two states . The president tells protesters to avoid violence . Comment: Protesters in the mostly Muslim north charge the vote is rigged after Jonathan 's election .