Get latest articles and stories on World at LatestLY. Former Pakistan Prime Minister and PTI chief Imran Khan on Wednesday warned his supporters would not vacate D-Chowk in Islamabad until a date for fresh polls was announced by the Shehbaz Sharif government, a move that will lead to a rise in political tensions in the country. World News | Pakistan: Imran Khan Vows Not to Vacate Protest Site in Islamabad Until Fresh Polls Announced.