Sir: At least nine people, including six policemen martyred and around 30 injured in two terror strikes near DI Khan of KP. First attack was on a roadside checkpoint near Kotla Syedan village where four militants opened fired on two on-duty policeman and killed them. When the bodies of the slain policemen had been brought in a nearby hospital, a burqa-clad woman, a suicide bomber, blew her up near the ambulance outside the hospital. I would like to request to the concerned authorities to change modes operandi so that the peace should be maintained in Pakistan. HAMMAL NAEEM Via E-mail