A roadside bomb targeting a police patrol in Dera Ismail Khan has killed 13 people, including four policemen, report said on Tuesday. The bomb exploded as the patrol traveled through the town of Dera Ismail Khan on Tuesday. The dead included a senior police officer, DSP Iqbal Khan , as well as his two guards and driver. Khan was on his way to his office when his patrol was targeted in Kachi Paid Khan area at Bannu Road by the bomb planted in a rickshaw. A senior police official in Dera Ismail Khan says nine civilians were also killed by the blast, including two schoolchildren and a woman. Rescuers and police reached the scene soon after the blast and rushed the wounded to District Headquarters Hospital where condition of many said to be critical.