A teenager has died and three people are still in hospital after a serious crash on the southern outskirts of Belfast.
Police have named the tragic victim as Conal Daly, 18, from the greater Belfast area.
The collision on the Saintfield Road on Thursday evening involved two cars, a Jaguar Sovereign and a Volkswagen Polo.
The deceased is believed to have been a passenger in the Jaguar.
The female driver of the Volkswagen Polo, and elderly nun, and two males from the Jaguar Sovereign remain in hospital.
One of the males is believed to be in a critical condition.
Police were in pursuit of one of the cars involved before the crash from the Ravenhill Road and Ormeau Road junctions.
A PSNI spokesman said the police ombudsman’s office has been informed of the incident.
The Saintfield Road was closed between the Manse Road and Ivanhoe Avenue.
A spokesman for Northern Ireland’s Ambulance Service said it received a call at 8.45pm.
Four accident and emergency vehicles were sent to the scene along with a rapid response paramedic.
Three males and one female were taken to the Royal Victoria Hospital in Belfast.
The Police Ombudsman is now investigating the incident.
Investigators will try and ascertain if the officers involved were conforming to police guidance on the pursuit of vehicles.
A spokesman for the Police Ombudsman said: “We would be keen to speak to anyone who saw the collision or the pursuit leading up to it.
“We understand the pursuit began close to the roundabout at the junction of the Ravenhill Road and Ormeau Road in Belfast.”