Police say the 17-year-old girl found dead near Belfast City Hospital, who has been named as Tara Wright, was injured in an earlier one-car crash.
Tara was pronounced dead after being found in a grey MG car just before 3am on Sunday, at the City Hospital on the Lisburn Road in south Belfast.
A short time earlier, police had been alerted to a silver Mercedes on its roof in undergrowth near a roundabout on the Ballygowan Road in Castlereagh.
A man was found badly injured at the scene and was taken to hospital.
Police investigating the circumstances surrounding the death of Tara, and the crash which occurred on the Ballygowan Road at its junction with Manse Road during the early hours of Sunday, are continuing to appeal for information.
Inspector Nigel Henry said he wanted to extend his sympathies to the family of Tara at this very sad time.
“Our investigation is at an early stage, however, we do believe that Tara was injured during the one vehicle road traffic collision on the Ballygowan Road.
“We are appealing to anyone who witnessed either the silver Mercedes or grey MG to contact us to assist us with our enquiries. We also believe that a grey coloured MG vehicle conveyed Tara to the area of Belfast City Hospital therefore we are also appealing to anyone who witnessed this vehicle between the Ballygowan Road and the hospital to contact police,” he added.
Four men, aged 20, 21, 28 and 30 were arrested yesterday and have since been released on bail.
“If you have information about the collision, which you believe could assist our investigation, please pick up the phone and call us on the non-emergency number 101, quoting reference number 227 of 24/03/19.
“I would also urge anyone who may have dash-cam footage of either vehicle taken in the early hours of Sunday morning to contact us,” added Inspector Nigel Henry.