A 29-year-old man has died after he was hit by a police Land Rover in west Belfast.
Forensic teams have carried out an examination of the area
It is understood the police were responding to an emergency call when the man was knocked down on the Springfield Road at about 0100 BST.
Jim McMenamin, who was 29 and is believed to have lived nearby, was given first aid by police officers but died at the scene.
The Police Ombudsman's office is investigating the incident.
Forensic teams have carried out an examination of the area.
A spokesman for the ombudsman said that a family liaison officer has been appointed to support the man's family.
"The area has been videoed and photographed and any exhibits have been removed.
"The police vehicle has also been removed for further forensic analysis," the spokesman said.
'High speed operation'
The ombudsman's office has asked anyone who saw what happened to contact them on 02890 828627.
They also want to hear from anyone who has information about the man's movements earlier in the night.
Sinn Fein assembly member Michael Ferguson said the community was shocked and angered by the incident.
"What has been established is that the PSNI were involved in some sort of high speed operation and have ended up knocking down a completely innocent pedestrian," he said.
SDLP councillor Tim Attwood said it was a terrible tragedy.
"All sympathy must go to the family of the young man killed," Mr Attwood said.