MUSCAT: Four Oman natives were killed in a car accident on the Adam-Haima road. Three people were injured. All the four deceased belonged to the same family. The car was on its way to Dhofar Governorate when the accident happened. The accident took place today morning. Adam-Haima road witnessed a traffic jam for some time following the accident. The injured were admitted to Niswa Referral Hospital. The rescue operations were led by the Royal Oman Police.