Three passengers were killed and six others wounded when militants opened fire on a bus carrying passengers at Char Khel in Pakistan\'s lower Kurram Agency on Monday, (Geo News) reported. According to sources, a vehicle carrying at least 20 passengers was on way from Peshawar to Parachinar, the headquarters of upper Kurram Agency, when it came under attack by suspected militants. The injured include women and children who were shifted to nearby hospital for treatment.