At least six persons were injured when a speedy passenger bus overturned near Zero Point Interchange here in Islamabad on Saturday, police said. According to the details, a passenger van, 1474, was on its way from Rawalpindi to Islamabad but overturned here. According to the eyewitness, the incident occurred when the driver of the bus was trying to overtake another vehicle. They said that the driver lost the control over the vehicle and overturned. As a result, at least six persons were injured. After the incident, rescue teams and police reached on the spot. Later, the injured were shifted to Pakistan Institute of Medical Sciences (PIMS) and Poly Clinic hospital here. Police started the investigation of the incident.