Pakistani policemen examine evidence by the side of a bomb blast place arrived a laying a bet building arrived Karachi on April 21, 2011.Islamabad, Pakistan by slightest 15 relations were killed and 40 others wounded once a bomb exploded featuring in a making a bet bang featuring in Karachi, Pakistan, officials held Thursday.Raja Umar Khitab, a senior supervise administrator happening Karachi, thought the bomb was placed under a diagram by the social establishment and consisted of by smallest amount 2 kg approximately 4.5 pounds of explosive material. The blast made a cavern on the put, he added.The explosion happened happening the haven citys Ghass Mandi section, monitor spokesman Muhammad Saleem assumed.