A 44-year-old man found mysteriously injured in Oxford city centre remains in hospital with serious head injuries.

A passer-by discovered the man in St Aldates at around 10.25am on Sunday.

A bike was nearby but police do not know if he was attacked or was involved in an accident.

He remains at the John Radcliffe Hospital this morning in a serious condition and is still too unwell to be interviewed by police.

Anyone with information should call police on 08458 505505 or Crimestoppers on 0800 555111.