Hyderabad: Three people including a patient in an ambulance were killed after the vehicle collided with a car on Friday morning here at Adibhatla. It is learned that the patient inside the ambulance had been shifting to a hospital in Hyderabad from Eluru for emergency treatment when a car rammed into the ambulance leaving the three dead on the spot at exit no. 13 on the outer ring road (ORR). On the other hand, four people inside the car were seriously injured. According to the police, the person at the wheel was believed to have dozed off which resulted in the accident. Alerted over the mishap, the police registered a case and are ascertaining the details of the deceased.