ISLAMABAD: The Election Commission of Pakistan (ECP) has established a control room under the supervision of the Director General (Election) to receive polling day complaints, if any. As per schedule, the by-election in the constituencies PS-22 Naushero Feroze-IV, PS-106 Karachi-XVIII and PS-117 Karachi-XXIX would be held on June 2. The complaints can be registered from 8am to 7pm at official telephone number.