Police have confirmed that a man was not seriously hurt after injuring himself on a shop window on Gloucester Road.
Emergency services rushed to the Co-Op in Bishopston at around 3.20pm on Saturday (July 6) after reports an injured man was losing a lot of blood.
A spokesperson for Avon and Somerset Police confirmed the victim only suffered minor inguires.
Bristol Live understands the incident was unconnected to St Paul's Carnival, which has been running nearby all day.
The scene was described as a looking like "bloodbath" by one passer-by.
Witnesses who spoke to Bristol Live reported large amounts of blood - with two revealing they had seen the injury being inflicted to the man’s shoulder area.
They both said the man had broken a window at a solicitor's office on Gloucester Road, before running across the road to Bishopston Co-op.
“He had a really big cut and was kind of panicking and running,” said the caller who reached the injured man first.
“I got to him and guided him to stop running around.”
With the help of a Co-op security guard, the caller said he tried to stop the wound from bleeding using a pair of shorts.
One man who runs a business nearby said: "It looked like a bloodbath."
When the ambulance service arrived, the man was taken to hospital.
A police spokesman told Bristol Live no arrests had been made, but an investigation into criminal damage would be launched.
He added: “We’ll be looking to see what offences have been committed.”
A spokesperson for South Western Ambulance Service said: "We were called at 15:03 to an incident at Gloucester Road.
"We attended with a motorbike, a critical care team, HART (hazardous area response team), two rapid response vehicles and an ambulance."
Solicitor Marc White, who explained that no-one was inside his office when the window was smashed, wished to make it clear he believes St Pauls Carnival had nothing to do with the damage.
He said: "The most important thing I'd like to convey to the [St Pauls Carnival] festival organisers was it was a domestic incident. The chap had a row with someone and he punched the window."
