The family of a cyclist fighting for life in hospital have urged people to come forward with information about how he was hurt.
John Straw, aged 65, was found unconscious on Neepsend Lane, Neepsend, Sheffield, with life-threatening head injuries. His bike was found nearby.
The grandfather remains in hospital in a critical condition – and it has still not been established what happened.
His wife Denise said: “John is a loving father of two children and loving husband to me.
“We have been married for 42 years.
“We have five grandchildren, the most recent being born on Boxing Day.
“On Tuesday, January 14, John suffered a serious brain injury and he is now fighting for his life.
“I would appeal to anyone who may have any information as to how John sustained these injuries, or anyone who may have seen anything, to contact the police.
“I understand people often feel they don’t want to get involved, but my family and I just want to find out what happened to John.”
Sgt Mark Ramsden, of South Yorkshire Police, said: “We are investigating the incident to ascertain the exact circumstances prior to Mr Straw sustaining his injuries.
“It is unclear whether anyone else, or another vehicle, was involved.
“I believe there may have been a light-coloured car in the area and the occupants may possibly have witnessed something.
“I would encourage them, and anyone else who may have been in the area around the same time, or anyone who believes they may have witnessed Mr Straw riding his bike, to please make contact with the police.”
Anyone with information is asked to call police on 101, or Crimestoppers on 0800 555111, quoting incident number 105 of January 14.