A father-of-two who died after a car ploughed into a crowd of people during a disturbance was a Good Samaritan who was trying to help a stranger, police have said.
South Yorkshire Police named the 46-year-old man who died in the incident in College Close, in the Burngreave area of Sheffield, as Christian Marriott.
The force said Mr Marriott, who was known as Chris, was out for a post-Christmas walk with his wife and two young sons, aged eight and six, when he saw a woman lying unconscious in the street just after 2pm on Wednesday.
Officers believe he left his family and stopped to provide first aid to the woman, before a car then collided with them both and a number of others.
It is believed the woman had been involved in an altercation and several other people suffered injuries during the incident, including an off-duty midwife who had also stopped to help.
The woman Mr Marriott was helping remains in hospital in a life-threatening condition. The off-duty midwife suffered minor injuries.
Another man suffered serious injuries which are not believed to be life-threatening and four further people - three women and a man - all suffered minor injuries.
A 23-year-old man was arrested on suspicion of murder and a 55-year-old man was arrested on suspicion of attempted murder. Both remained in custody on Thursday night.
Detective Chief Inspector Andrew Knowles said: "This is an utterly heartbreaking case in which a Good Samaritan, who had stepped in to help a stranger in their time of need, has lost his life.
"Chris leaves behind a loving family including his devastated wife and two young sons. We are absolutely determined to secure justice for Chris and his loved ones following this horrific tragedy.
"Increased patrols will continue in the area in the coming days and local people will continue to see officers carrying out enquiries, including going house-to-house to gather witness statements.
"There are people in that community who hold information which is vital to our investigation and have not yet given statements. I want to be able to get to the bottom of what happened for Chris and his family. I need those people with information to do the right thing. If you don't want to talk to us directly, you can use Crimestoppers and remain 100 per cent anonymous."
