DERA GHAZI KHAN (INP):  At least three persons were killed and three others injured when a car plunged into a ravine here on Wednesday. According to border military police, the accident took place on Quetta Road Khar area of DG Khan where a private car with six persons on board skidded off the road while overtaking a vehicle and fell in the gorge. The injured persons were shifted to Trauma Centre of DG Khan District Hospital.