A man who died after being found lying on a road seriously injured on New Year's Day has been named by police.

John Ogston, 67, was found by a passer-by at the junction of Mains Road and Bayne Square near Dens Park in Dundee at about 11pm on January 1.

He was suffering from serious injuries to his head and body.

Mr Ogston was helped into a nearby house and then taken to hospital but died on Tuesday.

His death is being treated as unexplained and police are appealing for several witnesses to contact them.

Detective chief inspector Graham Binnie said: "We are urgently looking to trace a number of witnesses, in particular the driver and any occupants of a red Audi-style motor car, four men who assisted with helping Mr Ogston into a nearby house and the driver of a taxi who may have driven along the street at or near the time of the incident.

"I would stress that due to the circumstances of the incident it may not have been immediately obvious to anyone who saw Mr Ogston that he was seriously injured.

"I would also appeal to anyone who has knowledge of the incident to contact Police Scotland.

"Also, we would like to reassure the public that there will be an increased police presence in the area as officers will be conducting house to house and CCTV enquiries in the coming days."