Pakistan Top StoriesKarachi: Cracker attack on school, threatening letter receivedTNT DeskFebruary 3, 2015February 3, 2015 by TNT DeskFebruary 3, 2015February 3, 2015 KARACHI: Unknown assailants hurled a cracker on a private school situated in Gulshan-e-Iqbal block 7, local media reported on Tuesday....