Pakistani politician Imran Khan is giving a three-day ultimatum to the national election commission to investigate his party's claims of vote-rigging in last week's parliamentary polls.
He warned on May 16 that his party would launch countrywide protests if its grievances were not addressed.
Khan, chairman of the Tehreek-e-Insaf party and a former cricket star, is demanding investigations into the contests for 25 parliamentary seats.
Khan's supporters have complained about alleged efforts to keep them from getting to voting booths in the May 11 polls.
Most of the accusations of voter fraud concern Lahore and Karachi.
Election winner Nawaz Sharif has called on Khan to drop his complaints of vote rigging, saying the polls were "by and large free and fair" and that all sides should accept the results.
Based on reporting by nytimes.com and guardian.com