An alleged knife fight in south east London left a car “covered in blood” witnesses say, as paramedics battled to help the critically injured man.
A man in his 20s was found at the scene suffering from head injuries and he was rushed to hospital in a life-threatening condition.
Photos from the scene showed a blood-smeared car with its doors open as police cordoned off the area.
One woman, who works nearby, said she arrived at the scene just minutes after the incident took place as paramedics tried to help the man.
She told the Standard: “He literally had blood everywhere.
“It was all over the Astra, inside the car. It was very bad.”
She said: “I arrived about 8:45am, to see the entrance of our estate being tapped off completely.
“There were two ambulances and about six police cars.
“The victim was laying at the entrance of Bilton Road and the ambulance crew were working on him.
“I did get a look at the victim face which was completely covered in blood.”
She said she was not allowed into work for hours as forensics officers arrived, combing the scene for clues.
A man, in his 30s, was arrested at the scene on suspicion of grievous bodily harm.
He is currently being held at a south London police station.
A Met Police spokesman said: “Enquires are ongoing to establish the circumstances of the incident.”
Anyone who witnessed the incident or has any information is asked to contact police on 101 or via Twitter @MetCC.
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.