Staff Reporter : Bangladesh Nationalist Party (BNP)-backed mayor candidates for Dhaka South City Corporation, Dhaka North City Corporation and Chittagong City Corporation Mirza Abbas, Tabith Awal and Manjur Alam have boycotted the election respectively alleging massive vote rigging by ruling Awami League backed candidates’ supporters. The announcement came at two emergency separate press briefings in capital Dhaka and Chittagong.