Individuals riding motorcycles threw hand grenades at a government school in Killi Ahmedzai, located on the outskirts of Quetta, late in the evening on Tuesday. The grenade exploded in the courtyard of the school, designated as a polling station, according to Dawn report. Balochistan: Nine Grenade Attacks in Quetta, Target Election Offices of Candidates and Polling Stations Ahead of Pakistan General Polls.