MUMBAI: The D B Marg police on Sunday registered a case against a 75-year-old Agripada businessman, his 18-year-old granddaughter and her minor friend after the underage boy, driving a high-end car registered in the businessman’s name, allegedly lost control and crashed into another vehicle inside the coastal road tunnel in the early hours of Sunday.A person in the other car was injured and was taken to the hospital.He was later discharged after treatment, said police. The police said that the accident took place at around 2am on Sunday and they had received information from the police control room about it. “ The high end car is in the name of the businessman. His granddaughter and her 17-year-old male friend were heading to south Mumbai when the accident happened. They wanted to go to the Gateway of India and took the coastal road,” said a police officer.He added that the minor boy said that the tyre of the car burst and he lost control. There were three persons in the car ahead and one of them sustained injuries.The granddaughter of the businessman had a driving license, said police, adding that, “We have taken the blood samples of the minor boy. The report is awaited.”The officer also said that it did not seem the minor was drunk. To verify the boy’s claim about the tyre burst, police said they have called the RTO officials to examine the car.Investigators have seized the car.